207 (two hundred [and] seven) is the natural number following 206 and preceding 208.

It is a Wedderburn-Etherington number.[1] There are exactly 207 different matchstick graphs with eight edges.[2][3]

References

"Sloane's A001190 : Wedderburn-Etherington numbers", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
"Sloane's A066951 : Number of nonisomorphic connected graphs that can be drawn in the plane using n unit-length edges", The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
Salvia, Raffaele (2013), A catalog for matchstick graphs, arXiv:1303.5965