On Thursday, 9 June 2016 10:21:47 UTC+1, The Natural Philosopher wrote:
On 09/06/16 09:55, John Rumm wrote:
On 09/06/2016 09:47, The Natural Philosopher wrote:

IIRC around 20kg

It does rather depend on the size. The last batch of 600x600x40mm slabs
I bought were 33kg each.

Ah, I don't think of those as 'standard'.

Your original 2004 answer was more accurate:
Too ****in much


NT