Hands down the fav xmas gift for the nephew this year. The padded muscles are quite the deal, but the hat fits a little oddly; in general kids hate stuff over their faces, anyway, no exception here.  Our nephew (5 yrs old), is height/weight appropriate (slender by national standards?), and he wore this all day and night over a t-shirt and a pair of board shorts - but it was a tad short in the torso, and won't fit through next Halloween for sure. We ordered the "large4-6" as he usually wears a 5T. I'm a seamstress and I was happy with the construction of the garment for the price - it's a very good, reasonably well made costume - not the highest quality, but not the cheapo sort either. It made our little Spidey very happy.