Pin Size:
Sakura:
Width: 1.07" in x Height: 1.7” in
Syaoran:
Width: 0.9" in x Height: 1.7” in
 
My Pin Grading system:
A Grade: A nearly perfect pin, with only up to 1 minor flaw.
B Grade: A Pin with 2-3 minor flaws
C Grade: A pin with about 4-6 minor or 1-2 major flaws.

(I would only go for C-Grade if you don't mind imperfections on your pins.)