I believe the Website has a cut charge for those, who would like the pieces, to be cut-to-length. $1 per cut.
Call, to check availability of material, and cut-to-length charges.
Note that shipping charges can be pricey, the 6ft lengths, are a UPS problem.
Longer than 6ft. There are split/roll pins provided to splice the shelves.
My shelves. Click to access pictures.