Hello. I just received my Single entry Thai Visa from Phenom Phen. I am in Cambodia now and need to stay maybe a month longer before entering Thailand. The dates of validity on my visa say: valid from 27 Oct 2017 to valid until 26 Jan 2018. My question is: will I get the full 2 months plus optional 30 day extension if I check into Thailand say on 1Dec 2017?

Yes.

 

You will get 60 days, extendable by 30 days, whenever you enter before the visa expires on Jan 26th.

Edited November 24, 20178 yr by elviajero

Yes, you will (60 days counting the first and last days) plus the optional 30-day extension.