Equipment Check out

A rule of thumb for me when I'm sizing kids.

Shoulder pads, I put my hands under the pads on their shoulders to see how close the pads are sitting on their shoulders. My experience says that kids try to wear pads that are too large for them. The look at the style rather than the size.

Helmets. I grab the face mask. If the skin on their forehead moves then I know it fits. A kid isn't going to wear a helmet that is too small for them, but may try to wear one too large.