Small X-Ray Category Insert Jackets / Envelopes, Top Loading with Anatomical Illustrations on Back. Size 10-1/2 x 12-1/2 Packed 250 Carton. These X-Ray category insert jackets have printed radiology procedures in different colors with anatomical Illustrations on the back. These jackets are filed in the X-Ray master jackets to allow the grouping of films per procedure for quick retrieval.