Good day @sfmoreno,
After a quick search I found the following information:
2212 920KV Brushless Motor
* Outer diameter: 28.0 mm
* Height: 24.0 mm (Without Shaft)
* K V: 920kv
* Standard Current : 15-25A Max Current : 30A
* Recommended prop : Li-Poly (11.1V) : 10x4.5 Li-Poly (14.7V) : 8X4.5
The dimensions differ by a couple of millimeters wherever I search for the information, which is strange.
The RPM can be calculated using a formula you can find online; without props, with a 11.1V battery and with no current loss the RPM should be ~10200.
The motors (+ESCs) you received should look like these:
If you need more specific information or this is not enough please say so and I'll look more deeply into it.