1 pc hardwood, 3-1/2" x 24" x 1/8" thick -- soundbox back
2 pc hardwood, 1-1/4" x 24" x 1/8" thick -- soundbox sides
1 pc hardwood, 1-1/4" x 3" x 3/4" thick – tailpiece
3 pc hardwood, 2" x 5" x 3/4" thick – pegbox
2 pc contrasting hardwood, 2" x 5" x 1/8" thick – pegbox
1 pc hardwood, 1-1/2" sq. x 1/8" thick -- soundhole (optional)
1 pc softwood, 3-12" x 24" x 1/8" thick – soundboard
4 tuning pegs, shaft at least 2-1/4" long, or hardwood to make 4
pc wood strip, 1/8" square x 21" long -- bracing strips

1 pc bone or hard plastic; 2-1/4" x 3/8" x 1/16" - 1/8" – nut
4 small nails or brass escutcheon pins -- string anchors

3 banjo second strings, aprox. 0.013" diameter
1 banjo fourth string, wrapped, to match second strings

1/16" brazing rod, box smooth paperclips, or toothpicks – frets
boiled linseed oil or other drying oil
hard paste wax
yellow woodworker's glue

The soundboard should be finegrain quarter-sawn spruce or cedar; or basswood if that is all that is available. The hardwood can be most any wood you like, though harder woods such as walnut are more durable used in the pegbox. Hobby shops often have walnut and basswood planks just right for this instrument, though you may have to trim the walnut or modify the dimensions of the sides. Let the wood season a couple weeks in an area of moderate humidity, assemble in same humidity -- try to avoid extremes before, during, or after construction.