This is Baltic birch-veneered plywood. It is suitable for interior cabinetry applications. Sheet size is 5 feet by 5 feet. The appearance is rotary-cut (the veneers are cut from the log in a spiral). The core is veneer, which is structurally stronger than an MDF, or particle board, core.
A Note on Grade & Supply
Update: 8/17/22 :
We have an excellent supply of Baltic Birch Plywood in stock in a mixture of the B/BB and BB/BB grades.
Please note that the BB/BB grade allows for plugs on one or both sides.