Don't know what size will fit your item?
1. measure your item's width, length and thickness.
For example you have a book that is 6" wide, 9" long
and 1/2" thick
2. The correct bag's width = item's width plus item's thickness.
So you will need a bag that width is 6 1/2 (6 + 1/2) inches or longer.
3. The correct bag's length = item's length plus half of item's thickness.
So you will need a bag that length is 9 1/2 (9 + 1/4) inches or longer.
4. From above you will know you need size 6 1/2" x 9 1/4" or larger bag for
your 6 x 9, 1/2" thickness book.
) 
