Seed Trays

Here's the volumes of each cell in the different cell trays:

Standard 24 - 100ml
Standard 12 - 110ml
Standard 9 - 140ml
Standard 6 - 240ml
Dowding - 21ml
Huw - 70ml
77L - 35ml
40L - 70ml
28L - 115ml
15L - 310ml (a bit bigger than a standard round 9cm pot)
77H - 60ml
40H - 115ml
28H - 210ml
15H - 500ml

That's incredibly technical TMTT, a good deal of research went into it I'm sure.  Being  old school and old tech the written  volumes mean  very little to me, I've got to see them side by side. That's entirely my fault.