Quilted Backpack Approximate size is 13' x 11 " x 4". Machine Washable. Fully Lined. Each backpack can be personalized with your child's Name, single initial or three letter monogram. Most of them can be monogrammed on the flap or in the middle of the bag. For three letter monogramming, Traditional style is most commonly used (First, LAST, Middle) but please feel free to specify the order you would like them in.