I bought this for my son, he is a little small for his age, (he's almost four and still weighs 25 lbs) and it fits him fine, though it is a bit big without doing the extensions. This is my second set of Columbia snow clothes and I really won't buy anything else. I love the quality and that it can last me two years of winters and easily go through both my children. The snowpants are great, they keep him dry and I like that they are fleece in the top to be more comfortable. The front panels are more durable fabric. We haven't ripped either pair. The coat is the reason I am giving a 4 star rating. Though it definitely is doing its job and keeping him warm and dry. I wish it was not slick fabric in the inside, it's more of a preference, but I wish it had it since your spending almost $100 on the set. Also it feels thin, like not very insulated. But we live where negative temperatures are a norm and he has not once complained and has always said he was warm with no extra layers. So it's definitely doing its job, just a preference thing again!I ordered a 3T for our 3.5 year old. He's pretty much average size. It fits OK, but the snow pants are a little snug. He'll be able to wear it this year, but will definitely out grow it this year.It's a great looking set, but as other reviewers mention, the coat is a little thin. This is fixed by layering up underneath when it's cold outside.Got the 4T for my almost 3 year old boy. Love that the straps for the suit are adjustable. You can get also get 2 inches out of the jacket and pants cutting a string that is on the ends. Everyone said the jacket was thin, but it kept my son toasty warm. I was so impressed that no snow got into his shoes and that everything felt completely dry after hours of play outside. Awesome product super happy with the price and quality. I recommend it!I'm very happy with the overall construction of this set - especially with the design function to gain length as kiddos grow. It was still a bit larger than expected for size 2T, but I think that will be a good thing for my family. My little dude seems to grow faster than I can keep up with! I'm pretty pleased with this purchase.I picked this up as a unisex snow suit for both my kids. The 3T perfectly fit my 3T daughter. I docked one star only because I live in Chicago and I found the jacket a bit lacking for 20-degrees... My daughter didn't complain though.I like very much this Columbia Little Boys' Frosty Slope Set. I made a purchase at an attractive price for me. my son is 4 years old and 112 centimeter. I bought a size xxs. before I have bought size xs it is too big, we will wear it over two years.Suit is very warm. Olso I like OUTGROWN grow system! next winter he will wear it too!Love, love, love this. We get compliments all the time because it looks so great, but also has great details and I know keeps him warm. It does run a bit small, wish I had gotten the 4T size, but overall a great set.Northern Canadian with three children here. This went down through two boys. We also bought same product on girls version for daughter. And continue to buy larger sizes as they grow older. Columbia kids stuff keeps them warm and lasts for more than one child... Even boys!