Rough comparison between the median particulate size of sandpaper grits and diamond paste polishing compounds.

sanding_paper_paste_comparison.md

Abrasive Progression Ladder (Coarse → Fine)

Rank	Abrasive	Approx. Particle Size
1	P60	≈ 269 µm
2	P80	≈ 201 µm
3	P100	≈ 162 µm
4	Diamond paste 75 µm	75 µm
5	P240	≈ 58 µm
6	Diamond paste 45 µm	45 µm
7	P400	≈ 35 µm
8	Diamond paste 30 µm	30 µm
9	P800	≈ 21.8 µm
10	P1200	≈ 15.3 µm
11	Diamond paste 15 µm	15 µm
12	Diamond paste 9 µm	9 µm
13	P3000	≈ 7 µm
14	Diamond paste 6 µm	6 µm
15	P5000	≈ 5 µm
16	Diamond paste 3 µm	3 µm
17	P10000	≈ 1.74 µm
18	Diamond paste 1 µm	1 µm
19	P15000	≈ 0.92 µm
20	Diamond paste 0.5 µm	0.5 µm
21	Diamond paste 0.25 µm	0.25 µm