These mittens are crocheted by hand and not super stretchy like machine knitted ones, so please buy a size that allows for some space when worn.
Small Child's (suggested size for 6months - 2years) - 14cm full length including cuff, 6.5cm across the fingers, 3cm long thumb.
Medium Child's (suggested for 3 - 6 yrs) - 18cm full length including cuff, 7.5cm across the fingers, 4cm long thumb.
Large (suggested size from 10yrs - adult) - 22cm full length including cuff, 9cm across fingers, 6cm long thumb.
Also available to buy in my range-
XLarge (suggested for large adult male) - 25cm full length including cuff, 10.5cm across fingers, 8cm long thumb.