These balsa sheets can be cut easily using an x-acto or hobby knife - just cut out your printed fin shapes, trace it on to the balsa and slice it out!
Basswood Sheets Plywood Board Craft Wood Thin For Diy Arts - Temu
G10 Fiberglass Sheet 3/16 x 1 sq ft [14153] - $65.89 : Apogee Rockets, Model Rocketry Excitement Starts Here
Balsa Wood Strips, Hobby Lobby
Balsa Wood Blocks -- Specialized Balsa Wood, LLC
Fiberglass sheet for fins on small rockets, centering rings, and for skinning other items to make them ultra strong.
G10 Fiberglass Sheet 0.032 x 1 sq ft
ME 109 Scratch Build from Midwest Plans - RCU Forums
Woodcraft Woodshop Balsa Dimensioned Carving Stock - 4 inch x 4 inch x 12 inch Single Piece
Isamu Noguchi, The Cry
Good quality balsa wood For modelling and small projects
Balsa Wood 8 Sheets 18 x 4 x 1/8 (460mm x 100mm x 3mm)