After reading some posts here last year I picked up a pair of 80's for my almost 4 year old and they were great for him for the couple of times we got out. I also got some 100's because I got a good deal on them and figured he and his brother would use them eventually. I figured at 44.5" and 45 lbs this year that he should probably have 90's but when I brought him in to our local shop today the guy recommended 100's based on his weight. I'm inclined to use them since the boots that they are adjusted for fit him, but I still feel like they may be too long for him- he's very much a beginner. Thoughts? If I need to get him some 90's then I want to get on that! His little brother will use them eventually, too. He can get frustrated easily so I don't want long skis to inhibit him.