I have an average sized 5 year old boy & these gloves are huge on him.  There is a good 1-1.5" of extra finger room in each.  Nothing glows in the dark.  That blue-ish circle on each glove is nothing more than a different color on the glove. The product image portrays the circle as "glowing".  Of course, these gloves are enough to please my son when he's got his Iron Man costume on, and I didn't expect much from them.  Just wish the description was more honest & realistic.