Crocs Size and Fit guide

Brand & fit at a glance

Size system
US
Fit
True to size
Origin
Boulder, Colorado
Best for
Everyday wear

About Crocs: Founded in Boulder, Colorado in 2002, Crocs began with a lightweight foam clog and now spans sandals, sliders and lined styles for all ages. The shoes are moulded from Croslite, a closed-cell resin that is light, washable and easy on tired or sensitive feet. We find them popular for holidays, garden days and school breaks, and for anyone who wants slip-on comfort with no break-in required.

Crocs fit & sizing tips

  • True to size, roomy fit. Crocs come up true to size with a generously roomy toe box on classic clogs; your toes should not touch the front, and that slack is normal.
  • Between sizes? Round up. Crocs are made in whole sizes only (C4, C5 and so on, then J1 to J6 for older children). If your child sits between sizes, Crocs recommend the larger size, and the roomy fit usually swallows the extra half nicely.
  • The heel strap adjusts the fit. Clogs have a strap that can sit up over the heel for security or down at the back for an easy slip-on, which changes how snug they feel.
  • Our take. Great for sensitive or swollen feet, recovering from injury, or anyone who wants a shoe with zero break-in required.

Crocs Children’s Shoes

Crocs children’s shoes are sized in US sizes on the box: C4 to C13 for toddlers and younger children, then J1 to J6 for juniors. Use the EU size or the foot length in cm to find the right size, and allow about a thumb’s width of room at the toe. We stock from EU 20 (C4) up to EU 37 (J4).

Crocs children’s shoes size conversion
UK (site) EU US (box) Foot cm Approx. age Shop
4 20 C4 11.5 12–18 mths
5 21 C5 12.3 18–24 mths
6 22.5 C6 13.2 2 yrs
7 24 C7 14.0 2.5–3 yrs
8 25.5 C8 14.9 3 yrs
9 27 C9 15.7 4 yrs
10 28 C10 16.6 4.5 yrs
12 30 C12 18.3 5–6 yrs
13 32 C13 19.1 6–7 yrs
1 33 J1 20.0 7–8 yrs
2 34 J2 20.8 8–9 yrs
3 36 J3 21.7 10–11 yrs
4 37 J4 22.5 11–12 yrs

Glossary

Croslite

Crocs’ proprietary closed-cell foam resin, which is lightweight, cushioned and moulds slightly to the foot with body heat.

Jibbitz

The small charms that clip into the ventilation holes on top of a Crocs clog for decoration.

Heel strap

The adjustable strap at the back of a clog, which can be worn up for security or down for a relaxed slip-on fit.

Frequently Asked Questions

Do Crocs run true to size?

Yes, in our experience they come up true to size. Classic clogs have a deliberately roomy toe box, so your toes should not touch the front; that slack is normal, not a sign you need to go smaller.

I’m between sizes. Should I size up or down?

Crocs are sold in whole sizes only. Crocs’ own advice is to round up if your child is between sizes, and we would agree, especially on the roomy styles. Flip the heel strap up if you want a more secure feel.

Are Crocs wide enough for broad feet?

Crocs do not make separate wide fittings, but most styles are already generous. The classic clog is the roomiest; relaxed and standard fits are snugger if you prefer less volume.

Why does my pair say a US size on the sole?

Crocs label every shoe in US sizing on the footbed and box, even when you order by UK size. Use the EU size and foot length in our chart to cross-check rather than worrying about the US number alone.

Do Crocs need breaking in?

Not really. Croslite is soft from new, though the heel strap can feel stiff for a day or two. There is no leather to stretch; if they feel wrong on first wear, it is usually a size issue rather than something that will ease with time.

How should I clean my Crocs?

Hand-wash in warm water with mild soap and a soft brush, then leave them to air-dry out of direct sunlight. Avoid the dishwasher, a hot washing-machine cycle, or a tumble dryer, as heat can warp the foam.

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