Sep 25, 2019 · To meet different needs, chromatography sample vials are available in a variety of sizes. Standard vial sizes include 8x40mm (1mL), 15x45mm (4mL) and 12x32mm (2mL). The user can also select a vial with a normal (4 mm) opening or a wide (6 mm) opening, depending on the type of chromatography vial 's caps.