Difference between paper formats A4 and RA4, A3 and RA3

What is the difference between paper formats A4 and RA4, A3 and RA3 ? Are there differences between dimensions of A and RA paper format ?

The difference between A4 and RA4, A3 and RA3 paper formats are in dimensions. Paper formats beginning with R are so called raw formats, that are bigger.

The dimensions of each format in milimeters are:

A4	RA4	A3	RA3
297 x 210	305 x 215	420 x 297	430 x 305