Waterproof Sizing & Measurement Guide

Finding your correct size ensures optimal performance and comfort under water. Because dive gear relies on standardized size patterns rather than custom tailoring, taking precise body measurements rather than relying on your everyday clothing or shoe size is essential for the best fit.

Key Rule: Always Measure in Centimetres (CM)

Centimetres provide an exact unit of measurement, whereas UK, US, and EU shoe or clothing sizes vary significantly between brands.

Important Sizing Tips Before You Begin

• Aim for a Snug Fit: A properly fitted suit should feel snug against your body. If gear slips on effortlessly or feels loose, it is likely a size too large.
• Ignore Clothing Labels: Everyday clothing is designed for relaxed daily comfort, not hydrodynamic performance.
  • Collar Example: A shirt collar labeled 43 cm (17") often fits an actual neck size of 42 cm (16.5").
  • Waist Example: Jeans labeled 81 cm (32") may sit comfortably on a 91 cm actual belly measurement.
  • Footwear Example: Shoes marked EU 46 / UK 11 may measure only 28 cm in actual length.

How to Take Accurate Measurements

Follow these core preparation rules before recording your figures:

• Keep Tape Level: Hold the tape snug (not tight) and strictly parallel to the floor for horizontal checks.
• Stay Relaxed: Stand naturally without flexing, pulling in your stomach, or holding your breath.
• Wear Light Base Layers: Measure over a thin t-shirt and light trousers/pants.

1. Body Measurements (Suits & Undersuits)

• Chest: Measure around the widest part of your chest with your arms resting naturally at your sides. Ensure the tape remains level across your back.
• Waist: Measure around the widest part of your waist/belly over a t-shirt.
• Hips: Measure around the widest point of your seat/glutes over thin trousers.
• Neck to Crotch: Stand straight and measure along your back from the prominent bone at the base of your neck down to the perineum.
• Crotch to Ankle: Standing tall with straight legs, measure down the inside of your leg from the perineum to the ankle bone.
• Crotch to Floor: Standing tall with straight legs, measure down the inside of your leg from the perineum all the way to the floor.

2. Footwear Measurements

• Wet Boots: Place your bare foot flat on the floor and measure in centimetres (CM) from the back of the heel to the tip of your longest toe.
• Dry Boots: Wear the exact thermal socks you use for diving, then measure in centimetres (CM) from heel to toe.

3. Accessories & Seals

• Gloves: Make a relaxed fist and measure around your palm just below the knuckles in centimetres (CM).
• Hoods: Measure around your head circumference at the widest point (just above the eyebrows and ears) in centimetres (CM).
• Neck Seal: Measure around the circumference at the base of your neck in centimetres (CM).

How to Choose Your Size

1. Find Your Average: Select the size bracket that aligns best with the majority of your core measurements. It is completely normal for your dimensions to span across more than one size category.
2. Material Flexibility: Waterproof suits feature built-in allowance for natural movement. Softer tissue areas (like the waist) compress easily under water, whereas neck and head dimensions do not dictate suit torso fit.
3. Account for Undergarments: If sizing for a drysuit, sizing guide has already factored in your thermal layers. If you regularly dive in very thick arctic undergarments, consider choosing one size up for comfort and mobility.