Relative sizes of several different silver denominations during the early period of Roman coinage:
Top: RRC 13/1 didrachm, RRC 26/2 drachm, RRC 42/1 didrachm a.k.a. quadrigatus
Middle: RRC 106/1 victoriatus, RRC 95/2 half victoriatus
Bottom: RRC 53/2 denarius, RRC 45/2 quinarius, RRC 68/3 sestertius