Housewife Pillowcases have a sewn edge, fitting tightly to the Pillow. Oxford Pillowcases, on the other hand, have a fabric border around the edge (typically about 5cm)
As there is more material required, Oxford Pillowcases are usually a bit more expensive than Housewife Pillowcases.

 

What is an Oxford Pillowcase

An Oxford Pillowcase has a material border, usually of approx 5cm

 

 

What is a Housewife Pillowcase

A Housewife Pillowcase has no material border