Color Consistency: Paint your chairs the same color, or use the same fabric on the upholstery. This will create a cohesive thread throughout your chair set.
via Houzz via SF Girl By Bay
Make your intentions clear:
Make it obvious you intended the mixed look. Choosing chairs from different eras, like the traditional chairs with the ghost chairs, it a great way to mix with intent.
via The Lennox
You can look at Homebase's chair range for ideas to mix and match your own furniture!
Have you ever tried mixing and matching chairs?
This post is sponsored by homebase.co.uk, but all words and opinions are my own.