I have a couple Chicklets for my girls, 1 90, 2 100's and a 120. The 100 will be fine. Does it have a pad where the bindings mount? That's the newer style. The newer style that came out two years ago fits the smaller feet much better than the older ones. For some reason Burton made these smaller boards too wide. For a size 12 boot, use the Burton X-small bindings, they have one rachet and are easy get one and off. I also have a small pair of Flow kids bindings, but I do not like them as much as the Burton bindings.