The made to measure knot extender side angle.

The made to measure knot extender front.

The made to measure knot extender laying down showing hole.

The made to measure knot extender size comparison next to 330ml can.

The Made To Measure Knot Extender

Name: The Made To Measure Knot Extender
Brand: Uncover Creations
SKU: KNOTEXTENDER
Price: 79.00 GBP
Availability: InStock

£79

This slides over what you've already got and adds genuine length and girth, so you go from "fine" to "wait, hang on". It's body-safe silicone, and because it's made to your measurements so it actually fits rather than flopping about hopefully. Built off our knot dildo design, so the knot end is doing the heavy lifting it was born for.

Size Guide

Full details

Turn date night into a howl-fest! With our custom-fit Knot Extender you're in for a massive upgrade in both length and girth. Based on our best selling knot dildo, prepare to be, quite literally, the big talk of the boudoir!

How Big Will This Make You?
Simply subtract your penis length from the total length. Eg. If you are 6" long, then 9" minus 6" equals 3" gain of length.

A note on lube and finish

Extenders go better with lube. That's just physics (probably). Get a good water based lube, use more than you think you need, and you're set.

Platinum Silicone

We use platinum-cure silicone for every single product because honestly? You deserve toys that are safe, durable, and feel as good as they look.

What makes it so special?

It's non-porous, which means when you clean it, it actually gets clean clean. No sneaky bacteria hiding in microscopic crevices. No weird smells developing over time. Just pure, body-safe silicone that stays hygienic no matter how adventurous you get.

Plus, it feels incredible. Like, genuinely fantastic!

Secure Checkout

We accept credit cards, debit cards, PayPal, ClearPay, Sezzle and Klarna. All secure, all simple, all showing discreetly on your bank statement.

The canine-knotted shape means a noticeable swell at the base rather than a uniform tube, so the fullness builds where you'd want it to. The custom fit keeps it gripping close instead of sliding around mid-action.

Slips on over what's already there. No straps, no harness, just you plus extra.

Body-safe silicone that wipes clean with warm soapy water and tucks away without announcing itself to the room. Pairs well with a good water based lube (use more than you think you need), which also lets you decide how much and when to top up.

Made To Measure Sizing

Every penis is different, which is why one-size fits all extenders will rarely fit perfectly. With our extender, we offer made to measure sizing so that you can always get a perfect fit.

Find your perfect fit! Pop in your measurements (inches) to unlock your custom recommendation.

How to Measure

No geometry degree required - we've made measuring as easy as possible. Grab a soft measuring tape (or string!), and let's find your perfect match...

How to Measure: Penis Length

Standing tall (literally), measure the penis while erect - from the top side rather than underneath. Keep it natural and avoid pressing in, as this will give you an inaccurate measurement and result in a sleeve that's too long. Trust us, you don't want any uncomfortable pinching at the base!

For length, measure exactly how much you want covered. Here's the quick guide to rounding:

Spot on a whole or half number? Keep it exactly as is (e.g., if you're 5", stick with 5")
A quarter inch over? Round down (5.25" becomes 5")
Getting close to the next half? Round up (5.4" becomes 5.5")

Think of it like finding the right size magic wand - precision makes perfect!

How to Measure: Penis Circumference

The secret to a perfect fit? Our sleeves are intentionally designed to be snugger than your actual size. Think of it like a magical grip that creates just the right amount of suction and friction to keep everything in place during your adventures.

Not sure about your measurements? We've got you covered. We created a handy calculator to do the math for you. Just measure around with a soft measuring tape or string (if using string, mark where it meets and measure that length), pop that number into our calculator, and voila! Your recommended size appears like magic!

Remember: this isn't about size - it's about finding your perfect fit for maximum pleasure!

Size Guide (Inches)

Measurement	One Size	Mini	XS	S	M	L	XL
Head Circumference	6 15.2	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0
Head Diameter	2 5.1	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0
Knot Circumference	8.5 21.6	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0
Knot Diameter	2.7 6.9	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0
Shaft Circumference	6 15.2	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0
Shaft Diameter	1.9 4.8	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0
Total Length	9 22.9	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0	0 0.0

Product FAQ

Will this extender fall off?

Don't worry, your extender isn't going anywhere once it's on! And here's why:

First off, when you slide it on, it works a bit like a magic trick. It traps some air inside, creating a suction effect that keeps the extender snug and secure.

Second, because this isn't a one-size-hopes-to-fit-all situation, your extender is tailored to your exact measurements. It's like it's been custom made just for you (because, well, it has!), ensuring it fits perfectly and stays put, no matter what you're up to.

Why choose a made to measure extender?

Choosing a made-to-measure penis extender over a one-size-fits-all option is all about customisation. The truth is, no two penises are exactly alike, making it pretty unlikely for standard extenders to fit everyone just right. That's where these bespoke extenders come in. We tailor each one to your unique measurements, ensuring a perfect fit every time. It's the difference between wearing a suit off the rack and one that's been expertly fitted just for you.

What are the different colour options?

We offer 6 different colour styles, though not all are available on every product.

Surprise Me Basic - Leave the decision in our capable hands and we'll choose a solid colour that compliments your toy selection.

Surprise Me Premium - Leave the decision to us and we'll get creative with two or more colours. We love this choice as it allows us to get experimental with all of our colours, often resulting in our best pours.

Solid - One colour that will run evenly throughout your toy

Fade - Two colours combined that are gradually blended together. Colour 1 will be the tip of your toy and Colour 2 will be the shaft and base.

Marble - Two colours combined resulting in a veining effect similar to classic marble.

UC Trademark - This is a product-specific colour. The main image of the product is the UC Trademark colour.

For more information, take a look at our colour guide.

Why do you only use platinum silicone?

We use platinum silicone so you get a toy that is non-pourous (meaning when you clean it, it gets fully clean and can't transmit bacteria), doesn't smell, is body safe and feels fantastic.

If you'd like to learn more about cleaning your toys, read our sex toy care guide.

What do the colours actually look like?

Check out our colour guide to see exactly what our colours look like. But please keep in mind, each toy is hand-poured, so no two are exactly alike!