Common closure types include magnetic closures (including magnetic-folding designs), spring-hinge or extruded metal spring openings, and secure closures used in soft pouches.
Many listings include a microfiber cleaning cloth and a storage bag; one kit also lists a small screwdriver for minor frame adjustments.
Typical lengths run roughly 5.9 to 7.5 inches, widths about 2.4–3.1 inches, and depths about 1 to 2.6 inches. One foldable case lists an expanded size up to about 7.5 × 6.3 × 2.6 inches.
Many cases are lightweight and compact to fit in bags, pockets, or luggage; some include a carrying strap, and a few foldable designs collapse to save packing space.
Several listings indicate single-pair capacity (one pair per case); some pouches explicitly state they can hold two pairs of glasses or sunglasses.
Most cases are sized for standard eyeglasses and small-to-medium sunglasses, including blue-light/computer glasses and some 3D glasses. Certain foldable triangular cases offer extra room for larger frames.