I've made these for family and friends and they all love them. I adjusted the size to fit each person ranging from 4' 11" to 6'.
The changes I made from this pattern were:
1. All my front pieces were single piece fabrics in the person's favorite item, ie: animal, flower, etc.
2. Used 1/4" foam instead of batting/wadding.
3. Made the length (long edge) 11" to start with. The width according to person size but most started as 9".
What everyone likes best is the extra "flap" where the velcro comes together because they can either leave it resting against shoulder/arm or flip it under for extra lift.
Hope this is helpful :D