We bought normal sizes for 4 year olds. My 7 year old son is 4'7" 84 lbs - he's heavy and tall for his age but still athletic (not bulky). His regular size 10 shorts looked tight. He struggled to get them up and down down and there wasn't much space on the seat but the length was perfect.We tried the regular 12 but they are too long they just don't look good.Decided to buy 10 huskies very glad that we did this they are perfect 10 regular and 10 husky are the same length (perfect for us) but the husky gave him about 2 inches or so more in the stretch around the waist as well as a lot more room in the seating area of his boots Husky looks great too If you study the sizes of Regular and Husky you will notice that each size increases significantly in length Keep this in mind when choosing between Regular/Husky/One size up Hope this helps some of you in determining the size!
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