Based on this product's specifications, here are some alternatives and similar models
Carpenter Square PRO 180 mm Plastic with Base, model 100-E1-908
Summary description:
Carpenter square by PRO, model 100-E1-908, 180 mm length, made of plastic with an integrated base. Designed for marking, checking and measuring right angles and edges in woodworking and carpentry. Lightweight and corrosion-resistant tool suitable for workshop use, joinery, furniture making and on-site installations where a compact square is needed.