There are a total of 303 nebulae in the NGC and IC catalogues.
This list contains 67 of them arranged in order from large (IC 1396) to small (NGC 2261).
IC 1396, N 1499, N 3372, N 7000, IC 4628
N 2237, N 6727, N 6960, M 42, IC 434
IC 4604, IC 5070, N 6992, IC 1318, IC 2948
M 8, N 2174, N 2264, N 281, IC 4603
N 6334, N 1435, IC 405, N 2070, N 2024
N 1491, N 6357, IC 1805, M 43, IC 2177
N 2736, N 3199, N 3579, N 6188, M 20
M 17, N 7380, IC 1848, N 6888
N 3324, N 2467, N 7635, N 346
N 1579, N 6595, IC 63, N 896, N 1975
N 2023, N 7023, IC 5146, N 2359
N 7538, N 2067, M 78, N 6559, M 16
N 7129, N 1333, N 1931, M 1, N 1763
N 1788, N 2626, N 1624, N 2035, N 2261
How many have you seen?
Reference
Revised New General Catalogue and Index Catalogue
Wolfgang Steinicke Version: January 6, 2006
http://www.ngcic.org/hcngcic.htm
http://www.ngcic.org/steinicke/2006/explan.htm