Just got this costume for my soon-to-be 5 year old in size 4-6.  He couldn't wait to put it on and it was a hit with the whole family.  We were so impressed with the "authentic" look and quality material of this costume.  I'm dying to show him off to more people during his preschool parade and trick-or-treating!  My son is small for his age and is still wearing mostly 4Ts with some 5T's/4xs.  The pants have suspenders, and jacked up to their highest setting fit him well with just a bit of extra length.  I'm sure the adjustable suspenders would allow for a good fit for kids bigger than him- this costume has plenty of room.  Overall we are thrilled and would highly recommend this costume to anyone.  My husband and I think it is our favorite costume yet.