REMO heads within 1/16" over or under size:
20DH0700R Bongo head 7", Nuskyn
20DH0880R Bongo head 8.80", Nuskyn
20DH0975R Super Quinto Conga head 9.75", Nuskyn
20DH1075R Conga head 10.75", Nuskyn

REMO heads 1/4" under size, requires even tuning to make the fit:
20DH1150R Conga head 11", Nuskyn
20DH1225R Tumba Conga head 11.75", Nuskyn
20DH1325R Super Tumba Conga head 13", Nuskyn