On Tue, 7 Jan 2014 10:23:25 +0000, Sacha
wrote:

On 2014-01-07 00:22:43 +0000, Dave Liquorice said:

On Mon, 06 Jan 2014 20:56:36 +0000, Pete C wrote:

Yep, for me, pot diameter tells me what I want to know. 2lt is,
erm......oh I dunno!

Inclined to agree pot top diameter is easier to picture with ones
minds eye. I was going to add that is that "2 l pot" short and wide
or tall and thin but that argument could be used against just pot
diameter as well.

Quote everything? "15 cm (6") 2 l pot" B-)

We tend to use feet and inches on our web site but I should probably
spend hours going through it and putting both inches and cms into it!
I can get absolutely no mental picture of what 1.75m is! But the bits
I've read here and elsewhere convince me that it would be a good idea
to line up pots of various sizes, photograph them and show their sizes
with each one, both in litres & cms and probably, inches! Laborious to
do but easier for people to follow, I think.

Or you could just have a look at Crocus' website - they have dealt
with this very well. Look at an individual plant page and the pot size
guide.