ARG!That is her first egg, hopefully the rest will be larger. This egg is slightly smaller than one of my leghorn's eggs. Clearly neither a maran or leghorn egg as its identical to yours on the right.
Here's a pic of them...
The brown is Maran and the whites are leghorn... Then there's the speckle...
Definitely a turkey egg. Young hens especially small ones do tend to lay smaller than normal eggs.