15 Inchs Backpack

Overall	12.2" W x 6.5" D x 15.2" H
Interior	12" W x 14.9" H
Front Pocket	8.1" W x 6.8" H
Front Mezzanine	5.4" W x 4.9" H
Side Pocket (2)	5.3" W x 5.3" H *2
Shoulder Strap (2)	Max: 27 " Long, Min: 12.5" Long
Handle	6.8"

 

17 Inchs Backpack

Overall	13.4" W x 7.1" D x 17.5" H
Interior	13.3" W x 7" D x 17.2" H
Front Pocket	9.5" W x 7.5" H
Front Mezzanine	6.1" W x 5.5" H
Side Pocket (2)	6" W x 6.3" H
Shoulder Strap (2)	Max: 30 " Long, Min: 14" Long
Handle	6"

 

18 Inchs Backpack

Overall	13.5" W x 8" D x 18" H
Interior	13.4" W x 7.9" D x 17.8" H
Front Pocket	8.3" W x 10.5" H
Front Mezzanine	12" W x 16.2" H
Side Pocket (2)	4.8" W x 6" H
Shoulder Strap (2)	Max: 33.5 " Long, Min: 17" Long
Handle	4"