Denominations
as of the Fourth
Century A.D.
in gold:
Solidus (after 312
AD) ca. 2
cm, ca. 4.3-4.5 gr
Semissis
ca. 1.6 cm, ca. 2.15-2.3 gr
Tremissis
ca. 1.3 cm, ca. 1.5 gr
in silver:
Argenteus
up to 2.5 cm, ca. 2.6-3.0 gr
Miliarense
ca. 2.1-2.4 cm, ca. 4-5 gr
Siliqua
ca. 1.7-2.0 cm, ca. 1.7-3.4 gr
Half
Siliqua
ca. 1.3 cm, ca. 0.9-1.3 gr
in bronze:
reduced
Follis
ca. 2.8 cm or less, 9-10 gr, sometimes with silver on surface
Late Roman Bronze Radiates, used into the
Tetrachy,
same
size and design as the silver Antonininus had been
Doppelmaiorina
ca. 3 cm, ca. 7.6-9 gr
Centenionalis
ca. 2 cm, ca. 4-5 gr
Maiorina
ca. 2 cm, ca. 4-5 gr
Halbcentenionalis
ca. 0.9-1.0 cm , ca. 1.3-1.8 gr
The above names of the denominations are rather questionable, and names also changed over the decades. An alternative -in my view preferable - way of categorizing the late Roman bronze coinage that is frequently used:
AE1
above 2.5 cm
AE2
2.1 - 2.5 cm
AE3
1.7 - 2.1 cm
AE4
under 1.7 cm