EcoBox 84 x 14 x 79 Inches Shipping/Moving Carton for California King Size Pillowtop Mattress/Box Spring (E-7401) mattress/box spring not included This cardboard box fits most California king size mattresses box measures 84 x 14 x 79" and is adjustable to fit a California king pillow top mattress The box is intended for a California king mattress measuring a maximum of 14" thick 100% Recyclable MATTRESS/BOX SPRING NOT INCLUDED^This cardboard box fits most california king size mattresses.^Box measures 84 x 14 x 79" and is adjustable to fit a california king pillowtop mattress.^The box is intended for a california king mattress measuring a maximum of 14" thick.^100% Recyclable.