Bought this for my 4 year old and took size 5-6. The straps are adjustable so it fits her well if I reduce their length all the way. My 4 year old is 44 inches and weighs around 36; 40 Lb. The quality is definitely top end, and hopefully she will use it 2 to 3 years and it will still be ready to be passed on to #2! I'll keep you posted.

Bought this pant to go with the Karma Stripsicle jacket, love them both! My daughter is a petite 7. The Obermeyer Snoverall swallowed her up, Genie pant was too loose in the waist, even with the adjustable waist, but the Utopia works wonderful! The waist is still a little big for her, but the suspenders keep them up. Quality is superb, colors are match on to what is shown, and with the igrow system I am sure to get 2 years wear out of these! As always Zappos delivery was faster than expected!