Interesting Abigail-II, I will add that list to the list I have in my own notes. Typesetting and Typography have been my passion since teenage years. Whilst I claim no authority for this list, other than the fact that I have it, it might seem that the namings of the Anglo-Saxon point sizes use a different spelling for Pearl.

Pearl                 5 point 
Nonpareil             6 point 
Minion                7 point 
Brevier               8 point 
Bourgeois             9 point 
Long Primer          10 point 
Small Pica           11 point 
Pica                 12 point 
English              14 point 
Two Line Brevier     16 point 
Great Primer         18 point 
Paragon              20 point 
Double small Pica    22 point 
Double Pica          24 point 
Double English       28 point 
Four line Brevier    32 point 
Double Great Primer  36 point 
Canon                48 point 

Of course 1 perl = 5 * 0.3759mm = 1.8795mm (the Didot point is 1/72 of the French Royal Inch which was 27.07mm) whereas...

1 pearl = 5 * 0.3514598mm = 1.7573mm (The ATA or Anglo-Saxon point is a little smaller).

Of course, the now common in digital typesetting Postscript point is 1/72 of an inch, or approximately 0.3528mm, just to confuse the issue.

jdtoronto