Listings show overall lengths/depths ranging from about 6.3 to 7.5 inches, with widths around 2.7 to 3.1 inches. One foldable case lists an expanded length of about 7.5 inches while others are nearer 6.3–6.9 inches.
Common closure styles include magnetic folding closures on foldable cases and zip-top closures on hardshell cases. Protective features include hard or molded exteriors, soft linings or plush/foam interiors, and in some listings a sewn-in microfiber cleaning cloth.
Look for listings that mention expanded or stable triangular interior shapes and explicit interior dimensions; these designs and stated measurements indicate the case can accommodate larger or oversized frames. Hardshell travel cases that list roomy interior dimensions are also more likely to fit bulky frames.
Foldable cases emphasize lightweight, compact designs and magnetic folding for easy storage. Travel hardshell options may include carabiner loops or clips so you can attach the case to a pack, belt, or strap for hands-free carrying.
Some listings include a sewn-in or supplied microfiber cleaning cloth; foldable packages in particular may list an eyeglass cloth included with the case. However, inclusion varies by product.
Many listings sell a single case per package, while some foldable offerings are sold as multi-packs (for example, a listing that includes 4 cases and 4 eyeglass cloths).
Protection comes from soft linings in foldable cases and plush or cushioning foam interiors in hardshell options; both prevent scratching and provide some impact cushioning.
Foldable cases use a magnetic folding function so they collapse into a compact shape for storage, reducing the space they take up in luggage or bags.
One listing shows a folded size of about 6.3 × 2.7 × 2.6 inches and an expanded size of about 7.5 × 6.3 × 2.6 inches. The folded footprint is smaller for storage, while the expanded shape increases internal space to fit larger frames.
