Crocs should not fit like other shoes - they should be loose and roomy with your feet not  touching the sides or front of the shoes.

That is, up to half an inch (1cm) in front of your toes, behind your heel and you should be able to fit a finger between the rear strap and your heel.

No pressure points !

The shoes are made to roomy dimensions - so you simply order your NORMAL size as the extra roominess has already been built in.

For sizes between those sold - simply STRETCH the rear strap until it's just short of the back edge of the shoe.  The resin has 'memory' and will stay in this position.

To ensure you have the correct size - rotate the strap forward then stand in the shoe.   If your foot rests comfortably in the foot bed and there's room all round, then you have the correct size.   If the strap pushes the foot when you replace it round the back, stretch it as described above.