Aluminum coffee maker has several names: Italian style coffee maker, MOKA coffee maker , Espresso coffee maker etc.

There are many sizes:

1/2cup about  11.4*6*10CM

1cup  about  11.8*6.5*12.5CM

2cups about  14.3*7.5*14.5CM

3cups about  15*9*15.5CM

6cups about   17*10.2*19.5CM

9cups about  19*11*21.5CM

12cups  about   20*12.6*26CM

14cups about  21.1*13.5*28CM

AS the 1/2 cup generealy is 6-sides upper pot,  round boiler and 6-sides boiler.

Round boiler ( under bottom or under part) has 1/2cup, 1cup, 2cups, 3cups, 6cups, 9cups, and 12cups.

aluminum coffee maker-9cups