Hi I've a shower tray sized 770mm x 760mm to fit into an alcove. Currently everything on the market are sized at 760x760 mm. Therefore does this mean I need to buy a made to measure tray or is there anything else that can be done?

Cheers

What is the size of the alcove? Without a picture it's hard to determine the best approach. Can you trim 5mm each side or grout 5mm each side?