For my relatives, I do baby quilt at first, twin quilt at 1st grade, and typically queen sized for high school graduation. A lot of kids these days are in queen beds much earlier in life than I was
So far there hasn't been a wedding quilt, my son and DDiL have gotten married but so far and despite being asked have shared no hints on to what they would want as a wedding quilt and I've stopped asking -- the others are all single and around 30 now.