Size & Fit Guide

Find the right fit

This guide helps you understand the most important measurements for sunglasses, watches, clothing and footwear. Brand and model measurements can differ, so the exact dimensions shown on the product page always take priority.

Sunglasses & eyewear

Most eyewear is marked with three measurements in millimetres, for example 54–18–145.

  • Lens width (54 mm): the horizontal width of one lens.
  • Bridge width (18 mm): the distance between the lenses across the nose bridge.
  • Temple length (145 mm): the length of the arms from the hinge to the tip.

Best way to compare: use a pair of glasses that already fits you well and compare its measurements with the product specifications. Also consider total frame width and lens height when these are listed.

Watches & smartwatches

Measure your wrist circumference with a flexible measuring tape around the place where you normally wear your watch. Keep the tape comfortably snug, not tight.

  • Case diameter: the width of the watch case, usually measured without the crown.
  • Lug-to-lug: the distance from the top to the bottom lugs. This is especially useful for judging whether the watch will sit fully on your wrist.
  • Case thickness: indicates how high the watch sits on the wrist.
  • Strap or bracelet length: check this against your wrist circumference. Metal bracelets can often be resized by removing links.

If two watches have the same case diameter, they can still fit differently because lug-to-lug length, case shape and strap design also affect the fit.

Clothing — how to measure

Chest: measure around the fullest part of your chest, keeping the tape level.

Waist: measure around your natural waistline without pulling the tape tight.

Hips: measure around the fullest part of your hips.

Women's clothing — general conversion

EU UK US
34 6 2
36 8 4
38 10 6
40 12 8
42 14 10
44 16 12

Men's clothing — general conversion

EU UK/US
44 34
46 36
48 38
50 40
52 42
54 44

Footwear — how to measure

Stand on a sheet of paper, mark the heel and longest toe, then measure the distance in centimetres. Measure both feet and use the larger measurement.

Women's footwear — general conversion

EU UK US
36 3 5
37 4 6
38 5 7
39 6 8
40 7 9
41 8 10

Men's footwear — general conversion

EU UK US
40 6 7
41 7 8
42 8 9
43 9 10
44 10 11
45 11 12
46 12 13

Always use brand- or model-specific measurements when available. They are more accurate than general conversion tables.