The savvy folks at Retro To Go posted about this Addias "Vespa Shopper."
According to the Addidas UK site (I couldn't locate it on the US version) the bag is:
features an allover print of infamous Italian scooters, with a Trefoil link on the back and a hanging zip pocket inside. Dimension - 39/31 x 42 x 7 cm
While Retro To Go isn't a scooter-centric site, they often feature scooter-related items. You should follow them, or visit their site often.