The personal standard  or Royal Flag of King Bhumipon Adunyadet consists of a yellow field, with the initials B.P.R. (ภ.ป.ร.).

The initials stand for Bhumipon Parama Rajatiraat, which can be translated as ‘Bhumipon, great king of kings’. It is similar to an older version of the flag in red print (fig.). In Thai, this standard is referred to as Thong Bo Po Ro.