I have found the formula for measuring the defect free length on graphene layers but is it possible to measure the lateral size also. I think there is negligible relation between lateral size of graphene and intensities of D, G and 2D band.
Fernando Vallejos-Burgos
You can do it with the ratio of I(D) / I(G). This is represented in the Tuinstra-Koenig relationship where that ratio is proportional to the inverse of La ("lateral" size).
A great reference is this work by Ferrari:
Article Raman Spectroscopy of Graphene and Graphite: Disorder, Elect...
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