how do u measure a screen size.mine is 23inch wide 13inch deep and 26inch from corner to corner.yet my supplyer says its a 28inch wide screen.is he right or have i got wrong size telly.

daubhilldrifter@ntlworld.com, March 2005

My guess is you have purchased a 26" 66cmV LCD panel.

It's unlikely the dealer is trying to deceive you but he should have been clearer about this. He probably means the visible picture is equivalent in size to that on a 28" CRT. This is a common mistake due to the change from CRT to Flat Panel screen sizes.

Cobweb, March 2005

Screen sizes are always measured across the diagonal.
Trading standards requires TV's to be advertised indicating the visible picture size. In Europe Metric sizes must be indicated.

If it's a CRT (cathode ray tube) the manufactured tube size is quoted in inches but the visible picture must be quoted in centimetres.

This is because part of the glass tube is generally fitted behind the front cabinet moulding. So the visible picture if measured in inches is generally less than is implied by the televisions model number (which tends to prefix with the imperial size).

28" tube = 66cmV (visible picture).
32" tube = 76cmV (visible picture).

LCD and Plasma are commonly described in inches, as the panel size in inches is all visible picture. However, they should also be quoted in centimetres.

22" = 56cmV (visible picture)
26" = 66cmV
32" = 81cmV
37" = 94cmV
42" = 106cmV

Cobweb, March 2005