GC- 4X 2.5" Folding Pocket Magnifier Loupe Magnifying Glass LensUS FASTPER The durable plastic swing-away case not only provides a protective cover for the lens, but serves as a handle as well. It has a 2" (51 mm) focal distance and a 2" (51 mm) lens diameter. Measures approximately 3 1/4" x 2 1/2" x 9/16" (83 x 64 x 14 mm) closed and 6 1/16" x 2 1/2" x 9/16" (154 x 64 x 14 mm) open. The Pro Quality 100% glass lens used in this folding pocket magnifier provides crystal clear optics and durability for a long life.