
The following is a study of the Marine Corps regulations concerning miniature medals. In general if there are not specific regulations concerning miniature medals, we assume that they follow the full size medals.
The following gives all the information needed concerning Male configuration.
For men, the maximum width of the holding bar for miniature medals will be 4 inches, and the length of the medals from the top of the holding bar to the bottom of medals will be 2-1/4 inches. A maximum of five miniature medals side by side will fit on a 4-inch holding bar; however, a maximum of 10 medals will fit on the holding bar if overlapped. The overlapping on each row will be equal (not to exceed 50 percent). The right or inboard medal will show in full.
See the following chart taken from the regulations.

The following gives all the information needed concerning Female configuration.
For women, the holding bar for miniature medals will be no wider than 3-1/4 inches. A maximum of four medals side by side will fit on this width holding bar; however, a maximum of eight medals will fit on the holding bar if overlapped.
See the following chart taken from the regulations.

The following is the maximum amount of medals a male may fit in one row.

The following is the maximum amount of medals a female may fit in one row.

Use miniature devices.
Gold Stars. Those worn on suspension ribbons of miniature medals will be 1/8 inch in diameter.
Silver Stars. The silver star worn on suspension ribbons of miniature medals will be 1/8 inch in diameter.
Bronze stars worn on the suspension ribbon of miniature medals will be 1/8 inch in diameter.
A letter device is worn centered on the ribbon. These devices are block letters 1/8 inch high for miniature medal suspension ribbons.
Note:
The only letter devices currently produced in the miniature size are the V and M. All other are not available. Numerals are also not available.
Oak Leaf Cluster. 7/32" inch twig is worn on miniature medals.
Hour Glass. The device for the suspension ribbon of the miniature medal will be 1/8-inch high.
Vietnam "60" Device. The device for the suspension ribbon of the miniature medal and ribbon bar will be 5/8 inch in length.
The following are pictures of miniature medals with devices taken from the regulations.

Note:
The previous are the only device regulations that specifically reference miniature medals for the rest of the regulations please see the Marine Corps Ribbon Regulations or Marine Corps Medal Regulations.
As for the rack builder we interpret the regulations concerning miniature medals as follows: