Maximinus II Size: 23mm Weight: 7.58 grams Obverse: GAL VAL MAXIMINVS NOB CAES Laureate head right Reverse: GENIO CAESARIS / X / E K Genius, nude but for chlamys, standing front, head to left, wearing kalathos and holding patera from which liquor flows...

Commemorative CoinAe Follis Weight: 2.31 grams Size: 17mm Minted in Rome Obverse: VRBS ROMA Helmeted and mantled bust of Roma to left Reverse: She-wolf standing left, suckling Romulus and Remus; above, two stars. RFQ in exergue 

Constantine I - Commemorative posthumous issue. Minted in AntiochSize: 15mm Weight: 1.98 grams Obverse: DV CONSTANTINVS PT AVGG Veiled head of Constantine right Reverse: veiled and togate, driving quadriga to right, extending his right hand toward God (Manus Dei) above and holding reins...

Constantine I - Commemorative posthumous issue. Minted in AntiochSize: 16mm Weight: 1.72 grams Obverse: DV CONSTANTINVS PT AVGG Veiled head of Constantine right Reverse: veiled and togate, driving quadriga to right, extending his right hand toward God (Manus Dei) above and holding reins...

Constantine I - Commemorative posthumous issue. Minted in AntiochSize: 15mm Weight: 1.54 grams Obverse: DV CONSTANTINVS PT AVGG Veiled head of Constantine right Reverse: veiled and togate, driving quadriga to right, extending his right hand toward God (Manus Dei) above and holding reins...

Marcus Aurelius silver denarius.Minted: RomeSize: 17mm Weight: 2.72 gramsObverse: DIVVS M ANTONINVS PIVS Bare head rightReverse: CONSECRATIO Eagle standing right on thunderbolt, head left

You are buying all 18 coins. They range in size from 13-16mm.

Caracalla (211-217 AD) Minted: Nicaea, Bithynia Size: 28.5mm Weight: 12.7 grams Obverse: ANTΩNINOC AYΓOYCTOC, laureate head right Reverse: NIKAIEΩN, Tyche standing left, holding rudder and cornucopiae 

Greek coin from Pergamon Size: 16mm Weight: 2.52 grams Obverse: No legend helmeted head of Athena right Reverse: AΘHNAΣ NIKEΦOΡOY above and beneath owl standing facing on thunderbolt, wings spread 

Greek coin from Pergamon Size: 15mm Weight: 3.28 grams Obverse: No legend helmeted head of Athena right Reverse: AΘHNAΣ NIKEΦOΡOY above and beneath owl standing facing on palm branch, wings spread. ΣΑΣ-AP across fields

Caligula Size: 15mm Weight: 3.99 grams Obverse: ΓAIOΣ KAICAΡ, bare head rightReverse: ΦΙΛΟΚΑΙCAP ΦΙΛΑΔΕΛΦΕΙΩΝ [...] Capricorn with cornucopia left

Kings of Macedon - Alexander III Lampsakos MintAR silver drachm Weight:  4.09 grams Size: 15mm Obverse: Head of Herakles right, wearing lion's skinReverse:  AΛΕΞΑΝΔΡΟΥ, Zeus Aëtophoros seated left, holding sceptre; In left field, forepart of Pegasos left; monogram below throne.