You are looking for a sheet good (versus individual boards?) In my area the only plybead available has the narrow ‘boards’. Looks great in a century old home, looks silly in a ranch. Design is contextual.

Reversible MR (Moisture Resistant) Beadboard Panels

"One side of the panel has beads that are 2 5/8" on center. The other side has beads that are 4" on center."

Beadboard and "V" Planks

"V-Groove Planks feature a 1/4" wide "V" groove with 4", 6", and Random Groove spacing."

Wood & PVC Beadboard

Standard Widths: 2-1/2", 3-1/4", 4-1/4", and 5-1/4"

Use beadboard IF you have a home that is Colonial in style, otherwise, that material is a bit too traditional to be appropriate.

Make sure wainscotting is the correct solution or decorative option.

Board and Batten could be a good choice for wainscot.