Dual-Compartment TI Calculator Case

External dimensions: 20.5 × 10.5 × 3.5 cm; lightweight at ~145 g. Outer shell combines moulded EVA foam with abrasion-resistant nylon fabric. Interior features uniform plush velvet lining throughout, with no exposed seams or rough edges. Upper section contains a breathable mesh pocket sized for standard school accessories; lower section includes a fixed-position elastic band calibrated to hold calculators up to 19 cm long. Heavy-duty custom zipper runs smoothly and resists snagging; reinforced hand strap is double-stitched for longevity. Designed specifically for the physical realities of UK secondary and higher education: narrow classroom desks, crowded lecture theatres, shared lab benches and multi-hour exam sittings. Prioritises silent operation (no Velcro rustle), low-profile portability and consistent protection — not just aesthetics. Fits TI-84 Plus CE (standard issue in many UK sixth forms), TI-Nspire CX II series (required for IB and some university engineering courses), plus older but still widely used models including TI-89 Titanium and TI-86 — confirmed via physical fit testing, not just manufacturer claims.