Dennis, If the board is 2 layer, the board size can be bigger. The rule of thumb is .75" border for handling and .100" between parts for routing. If you score vs rout the part size can increase accordingly. Scores require zero spacing. I have seen suppliers fudge the borders sometimes but this is a risk for handling damage and imaging/plating problems. 16.5 X 11.2 is a standard (safe) part size. Steve Good morning everyone, Hope everyone had a great New years. Quick question. On a 18 X 24 panel what is the maximum size of an individual board and still get TWO boards per panel? Please no "contact your board vendor" replies. I have documentation for four different vendors and each has something different. And I understand that each will be different. I am curious how these vendors stack up with the rest of the industry. I've seen sizes from 16.00 X 10.90 (the smallest) to 16.50 X 11.20 (the largest). What is realistic? Is the 16.00 X 10.90 too conservative and the 16.50 X 11.20 too large?? Thanks for the replies Dennis ################################################################ DesignerCouncil E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE DesignerCouncil <your full name> To unsubscribe: SIGNOFF DesignerCouncil ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################ ################################################################ DesignerCouncil E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE DesignerCouncil <your full name> To unsubscribe: SIGNOFF DesignerCouncil ################################################################ Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################