Hi Dave, sorry for nitpicking, it's not 6 x 10 cm, you're missing a dimension there - it's either 6 cm x 10 cm, or 6 x 10 cm² which is a perfectly valid way to write this (I realize this format is more common in Europe than in the US).
Thanks, Peter (talk) 05:14, 16 November 2021 (PST)
Perhaps I'm using an American idiom. To me "6 x 10 cm" is an abbreviated way of saying "6 cm x 10 cm", while "6 x 10 cm²" sounds like "6 cm² x 10 cm²". I won't fret about it.
Regards, Dave