These quality Foot thongs are stretchy and so comfortable.
 
SIZING is street AU.  Go up an entire size if you have a wide foot.  So a wide 5 should choose an L.
S -  Child 12-2
M -  Youth 3-5
L - Ladies 6-8
XL - Ladies 9-10
 
If you choose the wrong size just send them back for a refund or exchange.