I did a google search and this is what I found:
http://reviews.ebay.com/How-many-yo-...00000008606214
Many wonder how many yo-yos you need to make a quilt. This guide will help you determine how many 2 inch yo-yos you will need for a quilt.
Comforter sizes
Crib Quilt 486 yo-yo's
Toddler Bed 690 yo-yo's
Twin 1452 yo-yo's
Double 1760 yo-yo's
Queen 2021 yo-yo's
King 2444 yo-yo's
Bedspread Size (with longer overhang)
Twin 2214 yo-yo's
Double 2592 yo-yo's
Queen 2856 yo-yo's
King 3360 yo-yo's