3A50: A5 (approx 8.25 in x 5.75 in). 7mm lined, 50 pages.

6B50: Semi-B5 (approx 10 in x 7 in). 6 mm lines, 50 sheets.

6A100: Semi-B5 (approx 10 in x 7 in). 6 mm lines, 100 sheets.

1A40: A4 (approx 11.75 in x 8.25 in). 7mm lines, 50 sheets.