Sonoma Arched Wood Pergola. The Sonoma 12" x 12" Arched Wood Pergola is made with precision cuts and comes ready-to-assemble. Hand-dipped stain and beautiful arched roof design will add a touch of class to any backyard. Optional Lattice Roof or Privacy Wall available. Made in U.S.A. with 3 - year warranty on structure. Anchor System (required). Offers moderate protection from wind and sun, while creating the ultimate "outdoor room". Dimensions: 12" Pergola - 114.6"L x 114.6"W x 117.7"H. 14" Pergola - 192"L x 192"W x 111.7"H