Disclaimer: This is just a guide to give you an idea of what your coin might grade. Often coins will grade higher on one side vs. the other. In example, it's possible for a coin to grade G4 on its obverse, but grade VG8 on its reverse. Also, this guide is not a claim that one's coin will obtain any grade listed if submitted to a third party grading service.
Roosevelt Dime Coin Photo Grading
Very Good (VG8)
Very Fine (VF25)
Extremely Fine (EF40)
Almost Uncirculated (AU55)
Mint State (MS65)
Mint State (MS67)
Mint State (MS68)
Roosevelt Dimes with FB or Full Bands on the reverse torch are worth a premium above same grade examples with weakly struck torch bands.
The pictures of the Mint State grades are provided for example only, no way can the upper-grades (MS65-MS69) be determined using images alone. Furthermore, MS60-MS 70 are determined by many factors that just can't be seen in images.
It's important to note that any coin that's MS67 will almost always have a strong strike and toning can be found on most MS grades, but not on MS70 examples.