The Signature BSL Collection is offered in the following Grades & Sizes: Select Grade: choice of widths = 2.25", 3.25", or 4.25" / Lengths = min. 16" max. 28" / 20 sq. ft. per box. Horizon Grade: choice of widths = 2.25", 3.25", or 4.25" / Lengths = min. 8" max. 26" / 20 sq. ft. per box. Natural Grade: choice of widths = 2.25", 3.25", or 4.25" / Lengths = min. 12" max. 22" / 20 sq. ft. per box. Pacific Grade: choice of widths = 2.25", 3.25", or 4.25" / Lengths = min. 12" max. 28" / 20 sq. ft. per box.