I want to get DD another ss playdress set. She currently wears a size 80 but I got a playdress set in 90 for this year, hoping that I would get two seasons of wear out of it and it fits her fine. the bike shorts are more like capri's but thats okay. So for next year I'm thinking of buying another set in size 100 but I don't know what to do about socks. She's currently a size 6 shoe and the 5-7 socks fit her perfectly but if I'm planning on getting two seasons wear out of the size 100 play dress than I'm not sure if the 7-9 socks will cut it through two seasons. I know it's hard to predict shoe size but both DH and I have big feet and frankly I think a size 6 shoe for a 17 month girl is pretty big already. Would you go with the 7-9 for the next two summers or the next size up?