What changes at each size step
| Footprint | What it supports | What it will not do |
|---|---|---|
| 32 x 60 in | One user, a niche, a fixed glass panel | Comfortable bench, curbless without a door |
| 36 x 60 in | A fold-down seat, corner shelf, easier turning | Two users, wide bench |
| 42 x 60 in | A real bench and a curbless entry with a panel | Two heads running at once |
| 48 x 72 in and up | Twin heads, full bench, open curbless entry | Fit into most existing alcoves |
These are working dimensions, not code minimums. Your local building authority sets the actual requirements, and they should be confirmed for your specific project.
Why depth beats width
Widening a shower gives you elbow room. Deepening it gives you dry floor. In a curbless shower with no door, the distance between the head and the opening is what determines whether water reaches the bathroom floor, and it is the dimension most often cut when a footprint is being squeezed. If you have to choose, take the depth.
Making the same footprint feel bigger
- Run the floor tile continuously through a curbless entry so there is no visual boundary
- Use a full-height fixed glass panel instead of a framed door with a bulkhead above
- Carry the wall tile to the ceiling rather than stopping at a border
- Choose a larger tile format so there are fewer grout lines chopping up the surface
- Use one tall niche rather than several small shelves