Former BBC TV weatherman Bill Giles cut the ribbon to mark the opening of the new-look Chinnor post office and shop.
The store in Keens Lane in the village was shut for two weeks to allow for refurbishment before the re-opening on Friday, June 25.
As part of the refurbishment the store has doubled in size with more room to sell stationery and cards.
The post office has also changed its counter set-up and now has two open-plan counters and one screened position.
Previously, there were three fully-screened counters.
Mr Giles, a customer at the store, said: “I am delighted to be here to open the new-look post office and store.
“I want to thank new postmaster Bal Bains for taking on Chinnor post office and making all the improvements.
“This shows real commitment to Chinnor.”
A financial services room has been added for private conversations about financial matters and there is now a full range of bureau de change on demand.
The store is now open from 9am to 5.30pm daily Monday to Saturday – an extra five hours on a Saturday afternoon.
Mr Bains added: “Customers love the new post office and store and like the light, bright modern look and layout.
“The open-plan counters make it far easier for staff and customers to talk.”