what is the typical size for a chest logo
There is no standard size for a left chest logo. You must look at each logo and determine size. Most left chest logos are about 3 wide. Too wide of a logo will put the logo under the arm pits of small ladies. The best thing to do is make a copy of the logo and place it on the actual shirt. Use the copy machine to size the logo up or down. Once you have chosen the perfect size, send that size to your digitizer for punching.