What is the professionally accepted size for a logo and an ID card in Adobe Photoshpo?

i want the best resolution and size for a logo and id card for a company what number should i use??

What is the professionally accepted size for a logo and an ID card in Adobe Photoshpo?
A logo should be done in a vector gaphic format so that it can be blown up or shrunk to any size needed, from a tiny telephone book ad, to a business card, to a billboard on the size of a building.





There is no "professionally accepted" size for this.





350 by 500, for example would look pretty raggedy on the side of a truck.





And, 300 dpi is meaningless unless one knows what SIZE the graphic will be.
Reply:the size should be given by your client. credit card dimensions are roughly 3.370" × 2.125" and would probably be a decent size for an id (perhaps larger); however, the thing that will make it look crisp when printed is the resolution. 300 dpi is pretty standard for something of this sort, but if you had to you could probably get away with less.
Reply:I use logo size 350X500 for larger sizes