What screen size do you recommend for a tablet that I only want to use while on holiday to check emails and find out local information from the net ?(I don't have or want a smart phone!)
7" would suit you - compact and light for portability but the screen will be clear enough to read emails and browse the web.
Have a look at Amazon's own Fire tablets - cheap but functional
Yes I would agree with hc.. 7 to 8 inches would be quite sufficient for what you want to do. as long as it's Android! I recently bought an 8 inch tablet with Windows 10 which is in fact very good, but the screen is far too small for Windows.
IMO as large as possible. Once bought you'll find other things to do with it. It's not like you have to keep it in your pocket. You'll be carrying it whatever it's size.