NicheBox™ makes niching easier.  Can be combined to suit any desgin for your niche. 
It's uniquely desigined to fit perfectly between 16" stucs and 1/2" flange flushes with shower board, 
Pre-sloped, waterproof and easy to install and tile. 
 
NicheBox™ allows you to combine & design endless layouts using the below available sizes 
 
Available Sizes - 16"x8", 16"x16", 16"x14", 16"x20" Double, 16"x20", 50"x14"