Alabama Craig,
The Metro 505, five litre tanklock bag, is quoted as 5litres and 190 mm x 280 mm x 220 mm ( HEIGHT x DEPTH x WIDTH )
Significantly greater dimensions than the EA123 Givi 5litre bag. EA123 quoted as 100mm x 260 mm x 200 mm ( HEIGHT x DEPTH x WIDTH ) .
Does the Metro bag seem like 5litres to you or a bit larger ?
[I asked Givi, last year, to explain the anomoly but just got waffle).