Based on the helpful input from others who'd purchased this- I decided to give it a try for our tall slender 19 mo grandson.  He needed a 12 mo. waist size but was above average height so pants looked rediculous if too short and wouldn't stay up well in his own size.  These are unintrusive, look nice and I've already bought a 2nd set for our house.  My only wish is for the ones with the clips to have a dark clip for the dark band, as I would have ordered those in a heartbeat for his pants without belt loops.  This is a wonderful invention and so much nicer for him to play without his pants slipping down all the time.  Even his shorts hang nicer.  If you have a slim child, especially if they are tall- you're going to love these.