The stones are only two feet apart. The taller is 6'2" high, 1' thick, and just over 2' wide. The smaller stone is 5'2" high, 8" thick, and is also 2'2" wide. The cross carvings may date from the 6th-8th century, and stand on the site of a now lost village.
Each stone has an incised cross carved on its west face. These are Latin style crosses, ranging 2-3' high, with extended arms and crosslets in the angles of the arms. About 45' to the west is a small standing stone which is said to mark the grave of the farmer who took away some of the other stones.
A Victorian report suggested that two of the removed stones are thought to have been used as gateposts at Pultadie and two others suffered the same fate at Kilgallioch.
Laggangairn is one of the more difficult historic sites to get to; a stiff five miles walk along the Southern Upland Way from New Luce provides the easiest access.