The Frame Shop at MacDill AFB will help you select the right matting and moulding.
What they provide...
The custom Frame Shop presents a wide selection of custom moldings and matting. All their materials are acid-free to ensure the longevity of your picture. The skilled staff can assist you in choosing the best mat and moulding to truly make your picture into a work of art.
Do-it-yourself framing classes are offered on a monthly basis with excellent instruction on how to complete a project from start to finish. Participants completing these classes are certified to use the do-it-yourself frame area. They also accept certifications from other bases.
Source: MacDill FSS Website