Outcropping Lannon Gray Outcropping5 – 7 sq. ft. per ton (Standard size)7 – 9 sq. ft. per ton (Bobcat size) Lannon Outcropping – Weather Edge5 – 7 sq. ft. per ton (Standard size)7 – 9 sq. ft. per ton (Bobcat size) Rustic Weather Edge Outcropping5 – 7 sq. ft. per ton (Standard size)7 – 9 sq. ft. per ton (Bobcat size)