In notes to seller write:
Size:
Childs name:
Years celebrating Halloween:
Age/Height/Weight:
Their Costume:
8-10 likes/loves (in order of importance):
1 category to be highlighted under loves with up to 3 answers:
1 category to be highlighted in right column, with semi equivalent answers to sample:

To add more info, change more than name, add color, change/alter graphics add to cart as custom.  For more than one of these changes add as double custom.