Toddler backpack dimensions  - 10.5"L x 5.25" W x 12.5 "H  Medium backpack dimensions - 11"L x 6"W x 15"H Large backpack dimensions - 13"L x 6"W x 16"H Exterior: Made of 100% Polyester Canvas padded handle on top for easy carrying Adjustable padded shoulder straps with ruffles  Zippered main compartment One zippered exterior front pocket with ruffle detail Two exterior side pockets sized to hold water bottles Added trolley sleeve with zipper compartment Interior: Made of padded 100% Polyester  SweetHoney logo on inside Inside zippered storage Built-in slots for pencils and other supplies Toddler size easily holds spiral notebooks  Medium and Large backpacks easily hold 3-ring binders *The customize option is for embroidery only. Letter Patches & Happy Patches are sold separately and come unattached. Patches can be found here.*