Help needed

Hi all, I am getting hitched to my lovely English lady in Australia in Jan 2019. We are both lovers of vintage and ww2 and I would love to make up some RAF ww2 style folding chairs for our wedding. Link below
https://www.the-saleroom.com/en-gb/auction-catalogues/east-bristol-auctions/catalogue-id-sreas10117/lot-fda64015-1ad3-4a3e-ae83-a54101262d30
Is there anyone who has a chair or access to one who could measure it for me please and tell me the dimensions. I will be making them out of pine and painting them white. The Ikea ones look rubbish (closest we could find)

Cheers
Brenden