First a series, then a size
With Pasabahce, pick a series first and a size second, because the lines are designed to set a whole table. Timeless is the relief line with vertical ribs: wine glasses of 32 and 33 cl, a flute of 17.5 cl, a coupe of 16 cl, a long drink glass of 30 cl and a water jug of 1.4 litres, partly also with a gold rim. Elysia is rounder and softer in line and runs up to a gin and tonic glass of 50 cl. Casablanca and Tribeca are the tea lines, with glasses from 25 to 40 cl, sometimes with a matching saucer.
On size, the usual arithmetic applies. A tea glass of 25 cl is the classic measure and drinks quickly; 31 to 40 cl is more comfortable if you also pour a milky coffee or latte macchiato into it. For water, take 30 to 35 cl; for long drinks, 36 cl or more. For hospitality, watch the pack size: many series come in twelves, which is faster to restock than fours or sixes.