There are two choices: and I thought the taller one would hold more, but when I did the math, I found the flatter one holds about 33 cu. in. more. Mailing cost, $12.65, is the same.
Inside Dimensions: 11-7/8" x 3-3/8" x 13-5/8"
Inside Dimensions: 11" x 8-1/2" x 5-1/2"