I'm torn... Should I buy 18-24 mos for fall/winter for J, or keep him in 12-18 mos? He didn't grow into 12-18 until less than two months ago. And now he is fitting into that size nearly perfectly. He has a few 18-24 mos pieces that are huge on him. He was in 6-12 for 4-6 months. I'm wondering if he'll be in 12-18 most of the fall/winter?

How long was your LO in 12-18 months?