This is a you question and not one for the internet. Search for chairs using the search engine and you will see the brands we recommend. Visit google and find the retailers near you for an in person fit check and barring that, find a retailer with an acceptable return policy. To my knowledge, zero BIFL chair makers have a 6" seat pad, so you are going to have to find an aftermarket one or get a chair and have one custom made at a local uphostery shop.