My son is 5'7'' 125lbs, is size small good for him
749096
I'm 5'9 1/2 and about 164lbs and a Medium fits well on me. Maybe this will provide you with some guidance.
749097
I'm 6'1" 175lbs and a medium works for me. I believe it should work for your son.
135506
The youth size will fit him. Fits my 7 year old rather loosely...he is 50 lbs and about 3.5 ft tall.
601504
Given that I have only bought one size, and I am a fully grown adult, it's difficult for me to recommend which one you should pick for your son. But, I did scan through the reviews to see which ones mention buying smaller sizes for their children. I came across a few that would at least come close to your son's statistics. The first one I found was bought for a 9 year old who was "Very tall" for her age, and they got her a medium. The reviewer said that if you buy a size perhaps slightly bigger than you were hoping for, the outfit comes with several straps that wrap around the waist and legs that can tighten it. (which I can confirm is true.) The only part that I've ever found to be loose is the upper chest region. I can't even seem to get that region to stay tucked in when I move around too much in the outfit. Also, another reviewer bought this for her 13 year old son who was 5'7 and 120 pounds and chose large. She said it was "a tad loose, but not too long." This is probably the example you were looking for, so listen carefully: Given the fact that you son is the same age as hers, and is both shorter and weighs less than her son, Medium might be a wiser choice - but remember I can't confirm that, I've never bought or tried any other side except for XL. At any rate, I think whether you pick medium or large everything will be fine. The medium might fit perfectly, and the large, if you decided to get that one, would at least be really comfortable, nonrestrictive to motor functions, and more importantly; he'd be able to continue using it as he ages and grows. So either decision you make I think you'll find good things about either of them. Hope I was of help.
1135446
It will be perfect, no too big. But he will have some growing room. My son is 11 also and in a 10/12. I think the large is the right size to get. My son loves it! And he is picky about how things fit:-)
285197
I bought for a 5 year old boy, normal size. He weighs 46 pounds. It fits nicely and he should be able to wear for at least another year.
617262
Consider it a small size. My son is also 5 yrs old it's good on him but he has a small head. I hope it helped :)
1560316
My son is 12, small/thin, about 5' and under 100 lbs. He takes a youth large.
526004
The set is truly true to size so if he is on the smaller side such as not very tall and quite slender, then I think it should be fine.
516790
I am fairly small at 5'7 and at 140 lbs the smallest setting fits me. Probly a little smaller would be all right.
1943065
My son is approximately 5'7" and he has a lot of fun with it, I would say is about the perfect size for him.
438739
I bought it for my 5 year old and it fit him he weighs about 42 lb. I would look for a medium.
170538
My son wore the small and his waist is 30 and they fit him good but little long, be safe if you have bigger but and legs and are taller than 5' 4" go with med
640476
My son is 5' and thin. The size small is slightly large for him, but I wouldn't 't have ordered any other size.
920973
Yes, it runs small. I ordered a 7-8 for when my son was 5 year olds and it was just a little big. He was about 42 inches at the time. Hope this helps
1009435
I think it might be a little small. My son (who just turned 6 and is wearing size 5/6) fits perfectly in this now. In a year it will probably be too small.
1883798
It might be too small. I bought it for my son when he was 2. He is 4 now it it's snug. My son is very tall and average weight.
899389
My son is pretty small & was 5 yrs old when I bought. If he's a bigger child I'm sure it wld