Hair clippers for mens hair?

I rec ently bought some hair clippers to shave my head as ive never had it done.





But all the 'add on' plastic guards, are labelled , 0.1'; , 0.25'; , 0.5'; , 0.75';, etc


Not in the traditional 'Grade 1, 2 , 3 ,4 , etc '





So my question is what is the ';grade'; equivilent to the 0.5'; and 0.25';





ThanksHair clippers for mens hair?
that's the inch size would be left after using those guides. so for a 1'; cut use the 1'; blade. Your hair will be no longer than 1'; in length.





0.5 = 1/2 inch


.25 - 1/4 inch