The main indicator for how big your shower can be is, of course, the size and layout of your bathroom. Standard shower tray sizes come as small as 32”x 32” (80 x 80cm), but for comfort’s sake we’d recommend a 48” x 36” (120 x 90cm) size shower as minimum. There’s no maximum limit – if you’ve got the space go as large as you like. Corner showers are a good option for fitting into small bathrooms.