The G1581 (GBM‑2100‑1ADR) features a case made of resin (bio-based) with stainless-steel components, measures approximately 49.3 × 44.4 × 11.9 mm, and weighs around 72 g https://saicreationswatches.com/products/g1581-casio-g-shock-gbm-2100-1adr-analog-digital-watch-men