Reclaimed rough wooden boards, Doug Fir from a home built in 1900 close to Alamo Square.
All are 8 ft long, 1 solid inch thick and about 2 3/4" - 2 7/8" wide. Have 103 boards that can add up to 184 sqft if laid out next to each other. There are also 2x studs (the old kind) and boards up to 12" wide.