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Let’s get you measured up.
It’s important to get your measurements right as our restraints achieve their incredibly low profile by being a fixed size. In general, we can provide a very snug fit, but if you hope to wear your restraints longer-term, we recommend that you go a little looser. If you’re unsure and want to pin them down later, you can order now and provide us with sizes after the fact, so if you’re unsure, get in touch with us for help!


What you’ll need
For getting accurate measurements for your restraints, we recommend getting the following:
- A clothing (flexible) measuring tape
- A few small pieces of tape to secure your measuring tape for trying out sizes
- A pen and paper to note down your measurements
When we make your cuffs or collar, we’ll add the extra strap length needed so it overlaps in the locking clasp, so you don’t need to worry about that when measuring – we make your restraints to fit around the measurements you give us.
Take your time, and repeat if you’d like to be sure.
If you’re unsure about your measurements, you can contact us anytime to discuss. If you think you messed up a measurement, don’t worry – we don’t cut your restraints to size until just before we’re ready to do the final assembly, so repeating your measurements on a different day might be good for your peace of mind.
Remember, if when you order your restraints you select the option for giving us your measurements later, we’ll not cut your order until you’re certain – there’s no rush, and we want your restraints to be perfect for you.
Getting measurements for your cuffs

Measure your wrist or ankle where you’d like your cuffs to sit.
Keep in mind that your cuffs will usually sit where they’ll fall with gravity, and will be most comfortable “above” (closer to your body, further up your arms or legs) than your wrist or ankle bones.
Noting down the true measurement of your wrist or ankle might be useful for your own reference, or when talking with us about your measurements later if we need to clarify. The true measurement is right where the tape overlaps itself when it’s held gently against your skin.

Add a little extra length and see how it feels.
Think about how you’d like your cuffs to feel when worn, and add length to the loop around your wrist or ankle to see how you like it. You may find it useful to use a small piece of tape to hold it in place while doing this. If you’d like to experiment further, cutting some paper that’s the length you’d like to try and roughly 20mm (0.8 in) wide, and taping it around you is a useful way to test out the feel.
Everyone’s body is different, but in general, we find that ankle cuffs should be worn looser (to allow all those tendons and muscles to move about), whereas wrist cuffs can be more snug. Regardless, flex your arms and legs and see if your tape digs in. If it does, we recommend going a little looser.
Keep in mind that your cuffs shouldn’t slip off your limbs! This is very easy to achieve with ankle cuffs, but for wrist cuffs, you may be able to slip out if they’re too loose. To test this, pinch your tape measure at the dimensions you’d like your cuffs to be and see if you can pull it over your wrist and hand. If you can, or nearly can, consider going a bit tighter.
We also recommend making sure both your wrists/ankles are the same size, just in case! If you have a disability or health condition that means your wrists or ankles can swell substantially, we recommend accommodating that in your measurements.
Getting measurements for your collar
Measure around the base of your neck where you’d like your collar to sit.
Keep in mind that your collar will usually sit assisted by gravity, so unless you want a snug collar that’s against your neck higher up, measuring lower down will give a more relaxed fit.
Noting down the true measurement of your neck might be useful for your own reference, or when talking with us about your measurements later if we need to clarify. The true measurement is right where the tape overlaps itself when it’s held gently against your skin.
Using a mirror is useful for taking this measurement.
Add a little extra length and see how it feels.
Think about how you’d like your collar to feel when worn, and add length to the loop around your neck to see how you like it. You may find it useful to use a small piece of tape to hold it in place while doing this. If you’d like to experiment further, cutting some paper that’s the length you’d like to try and roughly 25mm (1 in) wide, and taping it around you is a useful way to test out the feel.
Due to the complexity of individual preferences on tightness, we recommend you experiment with what feels best before giving us a number.
If you have a disability or health condition that means your neck or throat can swell substantially, we recommend accommodating that in your measurements.

Screw-lock Biothane® cuffs

Screw-lock Biothane® collar
Still have questions?
Not to worry! Whether you’ve yet to order your restraints or you’ve recently placed an order, we’d be happy to help.