A postage stamp for a letter up to 50 grams from malta to malta costs €0.45. You can visit our postage calculator https://www.maltapost.com/postagecalculator?l=1
You can buy stamps from all post offices around Malta and Gozo, or from our philately website https://www.maltaphilately.com/en/issues/issue/i20004?returnurl=%2fen%2fissues%2fphi