What is houndstooth?
Houndstooth is a duotone textile pattern characterized by broken checks or abstract four-pointed shapes, often in black and white, although other colours are used. The classic houndstooth pattern is an example of a tessellation.

Have to say I’m not a fan of it as a complete head to toe fashion but I’m sure a it could break up an outfit with scarf/coat/handbag.
I particularly like the A line belted trench coat with faux fur collar from Bonnas Wales by Moda operandi at a staggering £249.99 and Christian Dior handbag at £1059.00 (What can I say I have expensive taste!)