No gauge is given.

Size info:
Adult Small to fit 29-32” chest;
Medium to fit 33-36”;
Large to fit 37-39”.

Child Small to fit 18-20” (Size 1-3);
Medium to fit 22-24” (Size 4-6);
Large to fit 25-27” (Size 8-12).

Materials:
Child sizes: 1 2oz skein each of 3 colors Sport yarn, smaller needles and hook
Adult sizes: 1 4oz skein each of 3 colors worsted yarn, larger needles and hook
Adult sizes:

Use the smaller needles and hook for child sizes and the larger needles and hook for adult sizes.