Ski Patrol Magazine accepts five sizes of ads: spread, full page, half-page, third-page square, and third-page horizontal. Ad specs are:

 Bleed  Trim  Safety
 Spread   18.5" x 11.375"  18" x 10.875"
 17.5" x 10.375"
 Full Page
9.5" x 11.375"
 9" x 10.875"
8.5" x 10.375"
 Half Page
 9.5" x 5.625"
 9" x 5.125"
8.5" x 4.625"
 1/3 Page (square)
 N/A  5.167" x 4.813"
 4.667" x 4.313"
  1/3 Page (vertical)  3.458" x 11.375"
 2.958" x 10.875"
 2.458" x 10.375"


For more information, please see the NSP Partnership Guide.