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Availability:
In Stock.
Arrives
Thursday, Oct 8
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Size: (1)-8pcs,1-10mm
Features
- For anyone with loose rings whether from weight loss, a wrong-sized proposal ring, or daily finger changes. Just insert this clip-on guard no glue, no tools. Instantly stops spinning and slipping.
- 8-piece set covers from 1mm to 10mm widths thin women's bands to wide men's rings. Clip-on design - easy and safe to use - ideal for wedding prep or daily wear. Reusable across different rings.
- Resize rings without damaging them. Reduce inner diameter by 0.5 to 2 US sizes. Stop the ring sliding/twisting off your finger. Waterproof stays secure through hand washing, dish soaking, or sweat.
- Made of smooth, flexible, non-scratch plastic safe for platinum, gold, silver, or tungsten bands. Provides a secure fit that feels weightless. Comfortable for all-day wear.
- Feramox US patent holder since 2020. Built for long-term daily use. Remove anytime without sticky residue. Trusted by thousands who no longer deal with loose rings.
Description
8 Sizes Clip-on Sizers Combo Set Sizers Sizers for Wide Rings Sizers for Thin Rings 3 Small Sizes 3 Medium Sizes 2 Large Sizes Does it work for all types of rings? It works best on rings with a flat inner surface(not for round rings). How much ring size does it reduce? It reduces 0.5-2 sizes, which depends on your ring width and adjuster size. Can i use this instead of professional ring resizing? Yes. It's a cost-effective and temporary alternative. And it's very easy to put on and remove anytime. Does it fall off when i wash my hands? No. Once you clip it on the ring correctly, it will stay secure during hand washing and daily wear. Can it be used on all ring materials? Yes. It's made of smooth, flexible, non-scratch plastic, which is safe for platinum, gold, silver, or tungsten rings and so on. Feramox is committed to enhancing jewelry wearability through thoughtful, user-centric design. We specializes in the design and production of innovative and invisible ring size adjusters. Our mission is to empower individuals to wear their rings with confidence and ease, transforming previously unwearable pieces into cherished everyday accessories.
Product Dimensions: 4.69 x 3.5 x 0.2 inches
Item model number: FM01-JA-5
Item Weight: 0.64 ounces
Department: womens
Manufacturer: Freeman Direct
Date First Available: April 15, 2018
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Oct 8
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: (1)-8pcs,1-10mm
It fits pretty well and hits that gap between half sizes perfectly. Recently lost a little weight, so my finger was just a smidge smaller than a 12; this made up the difference. It took a little bit of finagling to put it on the larger ring, but it was not too bad. Seems to be good quality and is pretty discreet. It is pretty thin, but if your ring size changes more than that, you should really resize it anyway.
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Reviewed in the United States on September 10, 2026 by Edwina Growden
Size: (1)-8pcs,1-10mm
This is a review and comparison of two different products: Feramox Invisible Ring Size Adjuster, assorted sizes (this product), and the Vancool (18pcs) Ring Size Adjuster (1.5mm/2mm/3mm) (https://amazon.com/gp/product/B073J4X9DH). I have several rings that were a little too loose and kept spinning around on my finger. I didn’t want to have them resized, because then they’d be too tight to go over my knuckle, so I decided to try some ring sizer products to see how well they worked. Bottom line: Overall I prefer the Feramox insert-type adjusters to the Vancool coil-type adjusters because of the look and comfort, but it all depends on your preference. Either type can be put in place after the ring is on your finger, so you don’t have to worry about getting the ring over your knuckle. The biggest drawbacks to the Feramox ones are that they may fall off and get lost if you don’t use the adhesive (and maybe even if you do), and you may only be able to use one size out of the package for a particular ring. The coil-type has the advantage of allowing you to adjust the ring size a little better by using thicker or thinner coils, and they won’t fall off. Detailed comparison: The Feramox adjusters, which were sold by “Freeman Direct”, come in a package of 8 in various sizes, to fit band widths from 1mm to 10mm. (They also sell packages for wider widths, so be careful what you order. If you are looking for sizers for thin rings like solitaires, this is the one you need.) Also included in the package are a silver polishing cloth and a sheet of adhesive. Unfortunately, the product information sheet comes attached to the adhesive sheet, so I didn’t realize what it was at first. There was a blue-green card that had the Feramox product information on one side, and a yellow backing on the other. The yellow backing was actually the backing for the adhesive tape sheet. I had to peel the Feramox card off it, which revealed the instructions for using the tape on the other side. The tape has a transparent film on one side, and the yellow paper sheet on the other. When you pull them apart, be sure to peel the Feramox card off, leaving the transparent film attached to the yellow sheet. Do not peel off the yellow sheet. If you choose to use the adhesive, cut a sliver of the tape to fit inside the groove in the ring adjuster. Peel off the yellow paper and attach the adhesive to the adjuster, then peel off the transparent film. I will probably not use the tape, because with the sizer stuck onto the band, I probably wouldn’t be able to fit the ring over my knuckle. Instead, I’m going to try wearing it by just slipping the sizer in place after the ring is on my finger. I’ll have to be careful not to lose it when removing the rings, but I think it will probably work out better for me, and none of the rings I’ll use it with will get daily wear. I found one sizer that perfectly snapped onto a 5.7mm gold band. The smallest sizer snapped onto a ring that was 2.16mm wide and stayed on. For the rings that are 1.25mm and 1.83mm, the smallest sizer wouldn’t stay on the ring by itself, but it seems to work okay on them if I slide them on once the ring is on my finger. Once in place, they’re virtually unnoticeable. The sizer is barely visible when looking at the palm side of my hand, and I don’t feel anything unusual except that the ring just feels a little thicker. It works great to keep the stone on the top of my finger where it should be, instead of sliding around. Unfortunately, you have to purchase a package of 8 different sizes, when you might only need one or two of the sizes. I wish they had packages of just one particular size, then I wouldn’t worry about losing one. On the other hand, I was able to use 3 of the sizes in this package, and since I’m not going to use the tape to stick them on the rings, I can move the smallest one between the rings that need it. You can use a sizer that’s a little wider than the band, so the two smallest sizes both worked for 3 different ring sizes. One other thing to note: When trying to get the rings on/off my finger with the insert in place, I found it a little more difficult than when using the coil type. Maybe it’s because the coil rolls around the ring, and helps the ring sort of roll over your finger. So if you do tape the insert in place, that might be an issue. Vancool Adjusters: This product was sold by “Nest My Life”. It comes with 18 adjusters (6 each of 1.5mm, 2mm, and 3mm coils, and also includes a polishing cloth. The adjusters are easy to use, just coil the desired size around the ring and cut it to desired length. I looked at a lot of similar products, but purchased this one because it included the smallest coils (down to 1.5mm). Most other packages did not come in a size less than 3mm. On a thin ring, the smaller coils look much better. The advantages of the coil adjusters are that you can use whichever thickness provides the best adjustment, and you don’t have to worry about them falling off the ring. You get so many of them, and only need a small piece for each ring, that it’s not a big deal if you need to replace them. Since the coils wrap around the ring, you don’t have to worry about them falling off. I also found that rings with the coil adjuster were easier to slide over my knuckle than rings with the insert adjuster, because the coils rolled and helped the ring move. But if you do have a problem getting the ring over your knuckle, it’s possible to put the coil on while the ring is on your finger. The downside is that they’re much more visible than the inserts, and are a little less comfortable. They also seem to slide around on the ring, which wasn’t a problem with the inserts.
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Reviewed in the United States on March 11, 2019 by TravelingFool
Size: (1)-8pcs,1-10mm
It was a little more difficult to apply than I expected it to be and it still slides on my ring a bit. The pack came with double sided tape to use in between the spacer and the ring if the spacer wasn’t increasing the width enough but having a thin ring, it’s almost impossible to use the stickers and get a good fit. It is durable and hasn’t scratched my ring nor has it bothered my sensitive skin. All in all I’d still buy again
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Reviewed in the United States on February 28, 2026 by Jess Haney
Size: (2)-6pcs,1-3mm
I was looking for an alternative to getting my engagement ring resized and this Invisible Ring Size Adjuster is it! I needed to go down 1 whole size and did not want to pay almost $150 to get it resized nor leave my ring at the jewelers for up to 3 weeks while it was getting resized so this ring size adjuster does the trick. It is comfortable, easy to use and is hardly even noticeable. I have not noticed it sliding around while on my ring. The kit comes with 3 widths/sizes to fit inside your ring band and 2 of each size with a polishing cloth , for the price - less than $8 it is a bargain and affordable so I can keep some more on hand should these get worn out. I take my ring off to clean and do dishes so I have not exposed it to harsh chemicals or a lot of water and I take it off when doing my nails and applying lotion. So far so good, definitely recommend!
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Reviewed in the United States on January 20, 2026 by Jennifer - Amazon Customer
Size: (1)-8pcs,1-10mm
These were a bit disappointing. Most were too wide to fit on my rings but they did help make the rings fit a bit more snugly on the ones that fit.
Reviewed in the United States on May 31, 2026 by ZenAF
Size: (1)-8pcs,1-10mm
5 stars for these! I really like these ring sizers. They're silicone and feel nice - a soft, supple feel - and they grip the ring nicely. My fingers are like some other reviewers - they swell and deflate depending on the weather or whatever, so these things are great for ending the frustration of the rings flipping around a lot. I got the newer snap-on kind. I know some reviewers said they got the old ones that don't snap on. But these snap-on ones are great. They're comfortable - I don't even know I have them on, and I'm wearing 2 different sizes sometimes. I have one really skinny one on my engagement ring. Then I have 3 "stack" rings with different size bands, and I used one wider sizer to put all 3 of them in and it works great to keep those 3 together and from moving around as much as they did. I don't have any problem with the sizer coming off when I take the rings off. Maybe that has something to do with the way it's being removed? I don't try to just pull them off, I wiggle the ring while pulling it off and they slide off easily. They're also very easy to take off while still on the finger. I have to do that sometimes if I have to take the ring(s) off when my fingers are puffed up - because even though I put the sizer on because my finger was "cold" and the ring was sliding around, the finger eventually gets warm and swells up again, making the ring tighter because of the sizer. Then I have to take the sizer off and use dish detergent to get the ring off. Just things you have to put up with because of bodily functions. They're pretty clear, not a cloudy color, I usually take my rings off when doing dishes, or anything where I'd normally take them off, so I don't know if they will, or how long it will take, for them to turn any color other than the basically clear color they are now. As with other reviewers, I wish you could order just the sizes needed instead of having to get those sizes you don't need. Or at least if they would give 2 or 3 of the same sizes, even if that would cost a couple bucks more. Anyway, I like them a lot so far, though I've only been wearing them for about a week. If they start breaking down and getting hard, like silicone sometimes can do, hopefully it will take quite a while before that happens. Maybe by then someone (this company, since these are really nice) will have a set with multiples of different sizes, or the ability to get more than one of the same size, as suggested.
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Reviewed in the United States on February 16, 2022 by Kevin R. Hunt
Size: (1)-8pcs,1-10mm
This comes in a set that allows you to find the right match width-wise for your ring band. Apparently these will work for any ring size (circumference-wise). My ring has three thin bands, so I used a medium width size adjuster from the set. I have the other ones left over I could use for other width rings if I ever need to. It took a little work to get this onto the ring, but the plastic bends enough that you can eventually get it to wrap around the band (took 5 minutes of pushing it on). The thing wraps around the band and stays pretty much wherever you place it but is easy to slide down to the center "back" of the ring so you don't see it. My ring still fits over my knuckle but now it doesn't slide forward and off my finger. It used to slide off every time my hands were wet. I don't feel this device, I only feel the tighter fit of the ring. I like this solution for a ring that I can't get resized. Also, my weight fluctuates slightly all the time (exercise routine changes, seasons/temperature, time of the month, etc) and I like that I can take this little device on and off as needed. This is well worth the price to not have my ring fall off and get lost.
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Reviewed in the United States on September 28, 2023 by Shawkins
Size: (1)-8pcs,1-10mm
Works well for its purpose, although, great differentiation in sizes which is nice. Worked will on my band.
Reviewed in the United States on August 11, 2026 by Libby Hall