Greenhouse glass or horticultural glass is 3mm in thickness and generally used for greenhouses, garden sheds and sometimes glass cabinets. Stock sizes available are 610mm x 610mm (24’’ x 24’’) 610mm x 457mm (24’’ x 18’’) 1422mm x 730mm (56’’ x 28.75’’) We can cut the glass to size for you while you wait. Alternatively, ring us to order over the phone and collect it when it suits you best.