These are the approximate ranges of areas of S2 cells at each level. The average size is that returned by S2CellId.AverageArea(), guaranteed to be within a factor of 1.5 of the high and low end of the range. Additionally, two random locations were chosen to provide example cell edge lengths.

level min area max area average area units   Random cell 1 (UK) min edge length Random cell 1 (UK) max edge length   Random cell 2 (US) min edge length Random cell 2 (US) max edge length Number of cells
00 85011012.19 85011012.19 85011012.19 km2   7842 km 7842 km   7842 km 7842 km 6
01 21252753.05 21252753.05 21252753.05 km2   3921 km 5004 km   3921 km 5004 km 24
02 4919708.23 6026521.16 5313188.26 km2   1825 km 2489 km   1825 km 2489 km 96
03 1055377.48 1646455.50 1328297.07 km2   840 km 1167 km   1130 km 1310 km 384
04 231564.06 413918.15 332074.27 km2   432 km 609 km   579 km 636 km 1536
05 53798.67 104297.91 83018.57 km2   210 km 298 km   287 km 315 km 6K
06 12948.81 26113.30 20754.64 km2   108 km 151 km   143 km 156 km 24K
07 3175.44 6529.09 5188.66 km2   54 km 76 km   72 km 78 km 98K
08 786.20 1632.45 1297.17 km2   27 km 38 km   36 km 39 km 393K
09 195.59 408.12 324.29 km2   14 km 19 km   18 km 20 km 1573K
10 48.78 102.03 81.07 km2   7 km 9 km   9 km 10 km 6M
11 12.18 25.51 20.27 km2   3 km 5 km   4 km 5 km 25M
12 3.04 6.38 5.07 km2   1699 m 2 km   2 km 2 km 100M
13 0.76 1.59 1.27 km2   850 m 1185 m   1123 m 1225 m 402M
14 0.19 0.40 0.32 km2   425 m 593 m   562 m 613 m 1610M
15 47520.30 99638.93 79172.67 m2   212 m 296 m   281 m 306 m 6B
16 11880.08 24909.73 19793.17 m2   106 m 148 m   140 m 153 m 25B
17 2970.02 6227.43 4948.29 m2   53 m 74 m   70 m 77 m 103B
18 742.50 1556.86 1237.07 m2   27 m 37 m   35 m 38 m 412B
19 185.63 389.21 309.27 m2   13 m 19 m   18 m 19 m 1649B
20 46.41 97.30 77.32 m2   7 m 9 m   9 m 10 m 7T
21 11.60 24.33 19.33 m2   3 m 5 m   4 m 5 m 26T
22 2.90 6.08 4.83 m2   166 cm 2 m   2 m 2 m 105T
23 0.73 1.52 1.21 m2   83 cm 116 cm   110 cm 120 cm 422T
24 0.18 0.38 0.30 m2   41 cm 58 cm   55 cm 60 cm 1689T
25 453.19 950.23 755.05 cm2   21 cm 29 cm   27 cm 30 cm 7e15
26 113.30 237.56 188.76 cm2   10 cm 14 cm   14 cm 15 cm 27e15
27 28.32 59.39 47.19 cm2   5 cm 7 cm   7 cm 7 cm 108e15
28 7.08 14.85 11.80 cm2   2 cm 4 cm   3 cm 4 cm 432e15
29 1.77 3.71 2.95 cm2   12 mm 18 mm   17 mm 18 mm 1729e15
30 0.44 0.93 0.74 cm2   6 mm 9 mm   8 mm 9 mm 7e18