A standard US-sized business card is a 2” x 3.5” rectangle.
If you read the product specs at Vistaprint, what you end up with is 3.43″ x 1.93″ – slightly smaller the what’s customary.
Perhaps it’s because they are not based out of the US. It’s hard to beat the cost but the size difference was noticeable to me, so I don’t think I will use them again.
FYI
Chinese business cards:
Size: 3.543” × 2.125” (90mm × 54mm); Aspect Ratio: 1.667
(This applies to China, Hong Kong, Singapore)
Japanese business cards:
Size: 3.54” × 2.165” (90mm × 55mm); Aspect Ratio: 1.636
Korean business cards:
Size: 3.54” × 2.165” (90mm × 55mm); Aspect Ratio: 1.636
USA Business Cards:
Size: 3.5” × 2” (88.9mm × 50.8mm); Aspect Ratio: 1.75