Overall heights on the shower cabins can vary, so it's best to check individual models for these details. General footprint dimensions in the various shower cabin types are as follows:-
800mm x 800mm, 900mm x 900mm, 1000mm x 1000mm, 1100mm x 800mm, 1200mm x 800mm, 1200mm x 900mm and 900mm x 700mm.
View this link to see our range of shower cabin models at the Smart Price Warehouse website
Alternatively, there are other FAQ's in the section that provide size information by Brand.