These are Quantitative Filter Paper, Grade 201, with 100 circles in each package.
The size of this filter paper is small (125 mm, 12.5 cm)

Type: Quantitative Filter Paper
Speed: Fast
Grade: 201
Maximum pore size: 20 ~25 µm
Filtration speed: Ash Content: Basis Weight 80 +/- 4
LL-PF1000201S-100