Amazon.com: BOX USA BPF201MS Foam Corner Protectors for Moving, 3" L x 3" W x 3" H, 3/4" Wall Thickness, 3" Height, 3" Width, 3" Length, White (Pack of 1000) : Industrial
3 3/4 x 3 3/4 x 3 3/4 O.D. (3 x 3 x 3 I.D.) Square Poly Foam Corner Protectors 3/4 Thick