Any size and colour as long as there are quite a few of the same dimensions.
The units are often 100 x 200 x 50 mm (or maybe 40 or 30 mm) high. They're
often left over from a paving job because a full pallet was ordered. Picture
here of what they normally look like:
https://www.stonepavingdirect.co.uk/products/sawn-granite-setts-driveway-blo
ck-paving-200x100mm
except that they're more often buff or red.
Thanks in advance.
