Complete hook size/gauge data:

• Small (7 3/4 inch sole): F hook, 4 sc=1 in, 4 sc rows=1 in
• Medium (9 1/4 in): G hook, 7 sc= 2 in, 3 sc rows = 1 in
• Large (10 1/4 in): I hook, 3 sc = 1 in, 3 sc rows= 1 in (all of the above are with TWO strands of yarn held together, US single crochet)