Soft Sided Expandable Backpack for Cats & Small Dogs, Please Check Sizing Before Purchase, Premium Brand Self Locking Zippers & Faux Fleece Padding||Backpack maximum exterior measures 17"Hx16"Wx10"D, Best Fit For Pets up to 16"Lx14"H and up to 24lbs.||Weighing in at only 2.8lbs, Designed with Breathable Mesh on 4 Sides for Proper Ventilation – Removable Faux Fleece Bedding with Plywood Base Insert for Support – Padded Shoulder Straps – Name Tag Holder – 2 Enclosed Pockets, 1 Mesh Pocket||The Tahoe Series includes a fold out expansion bay design for when it is stationary, which can serve as an extra play area for your pet||HOW TO MEASURE YOUR PET – I always recommend to measure your pet while comfortably laying down as this is the typical position during flight time. Keep in mind all of my airline approved totes are designed with pet safety and comfort as the priority, and then by airline under seat requirements, so sizing is limited by that criteria.