I would NEVER special order/ buy one smaller.Small people take baths/95 to 99 % adults take showers unless they grew up with or recently 'forced' to tub it.Make the shower,if thats what you have to do, as large as possible with a pan, then covered in river rock pebble floor,,,and ceramic tile the walls , over red guard,over cement board, over good insulation if its an outside wall,,,roxul is best, does NOT support mold like fiberglass,,,its spun from rocks.They also make a product you use INSTEAD of water when mixing your grout and its permanently sealed, forever,,,or use epoxy grout.Plastic or fiberglass enclosures are a joke and dont last from noon to dinner. crack, leak, get ruined often,,,are inferior product,,,and need special care, which renters dont EVER do.

In terms of best bang for your buck when it comes to energy consumption for heating or cooling, it won't get any cheaper than fiberglass insulation.

The fiberglass tub they used to replace it now looks like a piece of crap.

For an apartment, I would stay with the fiberglass inserts.

I'm interested in fiberglass replacement window options for another building.

Clean and functional is your best bet. a nice simple fiberglass surround, properly installed, so the floor is nice and firm.

They are small heated pools.   8x17x5ft deep6x13x4ft deep8x16x4ft deepAll of mine are fiberglass pools.  2 of them are the curvy shaped typed pools and one is a rectangle.  

Things like granite in a house where the competition doesn't have it, fancy trim, extra recessed lights, tile shower surround when others have fiberglass etc.

Not fiberglass.

I still remember one stupid review I did of popular six-inch fiberglass mesh.