Doc Johnson Signature Series - Girthmasterr - 8.5 Inch Realistic ULTRASKYN Dildo with Removeable Vac-U-Lock Suction Cup - F-Machine & Harness Compatible - for Adults Only, Vanilla
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Availability:
20 left in stock
Arrives
Sep 12 – Sep 15
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Size: Girthmasterr-8.5 Inch
Features
- Approximate Dildo Dimensions; Total Length: 9 in. (22.9 cm), Insertable Length: 7.25 in. (18.4 cm), Width/Diameter: 2.5 in. (6.4 cm), Circumference: 7 in. (17.8 cm)
- Handcrafted from ULTRASKYN, for The Ultimate Feel | Molded Directly from Girthmasterr
- Incredibly Lifelike Look and Feel | Textured Veins for Added Stimulation | Dual Density Design Feels Real | Soft Exterior and Firm Core
- Removable Vac-U-Lock Suction Cup for Hands-Free Play | Vac-U-Lock and O-Ring Harness Compatible | Includes Bag for Discreet Travel and Storage
- Phthalate-Free, Body-Safe | For Adults Only
Description
Girthmasterr's Signature Series Dildo certainly lives up to his name and is molded directly from his body. It comes with a fabric bag for discreet travel and storage. It also comes with a removeable Vac-U-Lock Suction Cup. Total Length: 9 in. (22.9 cm), Insertable Length: 7.25 in. (18.4 cm), Width/Diameter: 2.5 in. (6.4 cm), Circumference: 7 in. (17.8 cm). Constructed of Dual Density ULTRASKYN material this product is designed to mimic the the feel of a real penis. The ULTRASKYN material on the inside of the dildo is firm while not being overly rigid. The ULTRASKYN material on the outside is soft and feels just like skin of an erect penis. The ULTRASKYN material readily absorbs body heat and quickly warms to a body temperature. This dildo features a removable Vac-U-Lock suction cup. With the suction cup attached the dildo will stick to most non-pourous smooth surfaces. With the suction cup removed this dildo can be attached to any of the Vac-U-Lock harnesses for a completely different experience. It can also be attached a any thrusting machine that utilizes the Vac-U-Lock system. The possibilites are endless. Like all products produced by Doc Johnson the materials used are phthalate- free and body-safe. For Adults Only.
Color: Vanilla
Material: ULTRASKYN (TPE)
Brand: Doc Johnson
Model Name: Girthmasterr
Style: Girthmasterr
Product Dimensions : 8.9 x 2.3 x 2.3 inches; 1.31 pounds
Item model number : 8160-38-AM
Department : Adults
Date First Available : August 12, 2024
Manufacturer : Doc Johnson
Customer Reviews: 4.0 4.0 out of 5 stars (463)
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sep 12 – Sep 15
This item is non-returnable:
Non-returnable due to Product safety reasons
View our full returns policy here.
Non-returnable due to Product safety reasons
View our full returns policy here.
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Top Amazon Reviews
Size: Isiah Maxwell-10 Inch
This is a well-executed toy if you’re specifically looking for a longer, more realistic profile without too much thickness. The standout here is the ULTRASKYN material. It has that soft, slightly tacky feel that does a good job mimicking real skin, especially with the dual-density design. There’s enough give on the outside while still maintaining a firm core, so it doesn’t feel flimsy or overly rigid. That balance makes a noticeable difference in use. Size-wise, it leans long rather than wide. At 1.5 inches diameter thickness, it stays in a range that’s manageable for most people, while the added length gives you more flexibility in how you use it. The detailing is also well done. The veining and overall sculpt add texture without being overdone, so it enhances the experience without becoming distracting. The thickness and weight are actually just the sweet spot. Overall, this is a strong option if you prioritize realistic feel and a longer profile over maximum girth. The material quality is the highlight and really carries the experience.
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Reviewed in the United States on April 12, 2026 by Amazon Customer
Size: Girthmasterr-8.5 Inch
I don’t know what’s more unbelievable to think that man is walking around with this monster in his pants or to think there are women who are out there getting destroyed by it! I guess it’s in the name.. “Girth”.. The thing is THICK. Thicker than a standard 16oz water bottle and longer. It’s quite a stunning peen. As far as the quality goes so far so good. The suction cup is strong enough to hold the massive weight of the toy. There are no defects in the molding. It feels very real. My friend was grossed out by it because it feels so lifelike. The ULTRASKYN gets very tacky so it has to be stored correctly every time if you want to maintain it! A little corn starch and back into its dust bag helps. Overall I’m very pleased with it. It’s definitely not for beginners, keep that in mind before you buy.
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Reviewed in the United States on July 1, 2026 by Amazon Customer
Size: Brickzilla-13 Inch
Update, the stupid vacu suction thing broke the dildo after 3 attempts to use it. This thing has been horrible, no matter how hard you try, after halfway u can't slide it in anymore because it starts to bend and flop like a limp noodle. Once you go black you CAN go back with this one. Such a sad reality The Johnson is something, it is hella thick, it does in fact feel real in a strangely weird way. I sadly have to say it's near unusable, the little suction thingy, TERRIBLE, I wish I could say it sucks, but it doesn't suck at all, it slips and slides everywhere. I SRSLY DISLIKE this suction thing, it makes it impossible to use the Johnson when it's sliding along with it. Using it without the suction is difficult too, the thing is huge, it's too smooth to get a grip. Considering the suction thing is detachable, it leaves a big gaping hole in the back of the toy, so when you clean it, it's tedious to clean out the hole and drying it. I was really excited for this to arrive but I am let down so far by every aspect of it. Obviously I wouldn't know the genuine brickzilla but something tells me the real thing isn't as bendy and floppy as this one, I understand it's a toy but I feel a bit more sturdiness could help with a lot of the self play issues
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Reviewed in the United States on June 5, 2026 by ME
Size: Isiah Maxwell-10 Inch
Fantastic dildo if you take good care of it - read the instructions for storage and cleaning, corn starch to protect the material, and you'll be fine. I wish it was a little bit thicker, but it's a good starter toy. The curve is gentle, but nice. I use it along with a handle/grip attachment instead of the suction cup mount it came with. My one complaint is that the suction cup mount that came with it crumbled and was a lot of hassle to clean out of the bottom of the toy. The replacement hard vac-u-lock mounts work great though. That, and the balls could have been heavier. They don't really "slap", not even on long/hardish strokes. (Edited/blurred picture background for privacy)
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Reviewed in the United States on December 31, 2024 by Abeo
Size: Dredd-13.5 Inch
If I could give this toy more stars I absolutely would. The product itself was shipped fast and discreetly. Once unboxed it’s massive and heavy and everything a size queen needs. I couldn’t wait to try it, and when I did it didn’t disappoint. Long and thick it gave me the stretch I needed. Definitely not a toy I’d recommend for beginners
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Reviewed in the United States on December 23, 2025 by Chris V.
Size: Dredd-13.5 Inch
Dredd - 13.5 Inch ULTRASKYN Dildo - very soft outside and yet firm inside. Its not hard, and not floppy. My only issue was the 7" in circumference.. I thought I could handle it, but its a little too big for me. Only got 1/4 of the way before realizing...this isn't going to work. Lol. Going to have to try something else, not as thick this time.
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Reviewed in the United States on October 27, 2025 by Austin Texas Customer
Size: Lucas Frost-7 Inch
This review is for Lucas frost. Excellent toy. Perfect size. Nice girth. Only five inches of insertable length but I had a fantastic time. Every inch felt perfect. Good quality. Excellent to use while watching frost's amazing videos. Has weight to it and feels like the real thing. Shipped discreetly. Any fan of Lucas should buy this! Best toy ever. *Edit: If you do not store this toy properly, it can bend and melt!! You apparently need to be meticulous about cleaning, storing it properly (add cornstarch??? to toy before putting it away), and be incredibly careful to make sure it is not melting or bending!! You will NOT get a refund or replacement if you contact them, they will claim you did not store the product properly!!!
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Reviewed in the United States on February 9, 2026 by Starfire leo
Size: Girthmasterr-8.5 Inch
As a straight guy, I never thought I’d be saying this, but the Doc Johnson Girthmaster has really expanded my horizons... in more ways than one. At 8.5 inches, it’s got the size, and with the removable Vac-U-Lock suction cup, it's versatile enough to keep both of us happy. I use it on my wife, and let’s just say, she’s as impressed as I am (though I’m definitely the one who gets the most exercise). When the roles reverse and she’s pegging me, the harness compatibility is a game-changer. It’s the ultimate dual-purpose tool: satisfies both of us while providing a few chuckles along the way. 10/10—would recommend for adventurous couples looking to spice things up in all directions.
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Reviewed in the United States on May 21, 2025 by AMZ Keith