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SIZE GUIDANCE

Find your right fit.

Sizing can differ between brands. Compare the charts below before selecting your footwear.

AETREX

Adult size chart
EU 35 36 37 38 39 40 41 42 43 44 45 46 47 48
US Women 5–5.5 6–6.5 7 7.5–8 8.5 9–9.5 10 10.5–11 11.5–12 — — — — —
US Men — — — — 7 7.5 8 8.5–9 9.5–10 10.5 11–11.5 12 12.5–13 13.5–14
Heel-to-toe 22.1 cm 22.9 cm 23.6 cm 24.4 cm 24.8 cm 25.2 cm 25.6 cm 26.0 cm 26.7 cm 27.1 cm 27.9 cm 28.7 cm 29.5 cm 30.5 cm
Between sizes? Choose the larger size for the best fit. Width availability may vary by style.

BIRKENSTOCK

Adult size chart
EU 35363738 39404142 43444546
US Women 4–4.55–5.56–6.57–7.5 8–8.59–9.510–10.511–11.5 12–12.5———
US Men 2.5–33.5–44.5–55.5–6 6.5–77.5–88.5–99.5–10 10.5–1111.5–1212.5–1313.5–14
UK 2.53.54.55 5.577.58 99.510.511
MM 225230240245 250260265270 280285290300
Regular fit: Choose your usual size.
Narrow fit: Intended for slimmer feet; check the width symbol shown on the product.

CROCS

Unisex size chart
US Men 45678 910111213
US Women 678910 1112131415
UK 3–44–55–66–7 7–88–99–1010–11 11–1212
EU 36–3737–3838–3939–40 41–4242–4343–4445–46 46–4748–49
CM 2223242526 2728293031
Crocs footwear generally offers a relaxed, roomy fit. Fit can vary by model, so check the product-specific recommendation before purchasing.

GNL

Adult size chart
EUR 35363738 39404142 43444546
US Women 66.577.5 88.599.5 1010.51111.5
US Men 5.566.57 7.588.59 9.51010.511
UK 2.5345 66.578 99.510.511
CM 23.32424.725.3 2626.727.328 28.729.33030.7
GNL generally corresponds to standard European sizing. For Fire-Line and selected seasonal models, choose the same size you normally wear in comparable athletic footwear.
Still unsure about your size? Contact the SLYK team before ordering and we’ll help you compare the available fit options.