Full-size binoculars can be too large for many people, especially users with smaller faces. At about 4.5" long, Leupold BX-1 Yosemite binoculars fit smaller hands and adjust to fit the smaller interpupillary distance (the distance between the eyes) of smaller users with twist up eyecups and an ergonomic design. They are armor-coated, rugged and waterproof with L-Coat BAK4 Porro Prisms and fully multi-coated lenses. This BX-1 Yosemite is sold in clamshell packaging.