I don't want to leave anyone out here, but this large mala is most likely the mala for you if you are a guy who has been searching for a big and comfortable wrist mala.  I am so excited to have found a new source for naga shell beads.  They are hard to come by nowadays and I simply love them. Especially when the shells are inlaid with turquoise like these 15mm beads.

fully adjustable 15mm beads for wrists 6 3/4 to 12 inches.