Are Martin 12 string guitars made in America?

Martin make 12 string guitars in both the USA and Mexico. For example, the D12X1AE, part of the X Series, is made in Sonora, Mexico whilst the D12-28 is made in Nazareth, Pennsylvania.

Which is the most popular model?

At guitarguitar, the Martin D12X1AE is the bestselling.

What body size are the Martin 12 strings?

Martin have, over the years, produced 12 string guitars in a variety of body shapes but the most overwhelmingly popular shape for their 12 string guitars is undoubtedly the dreadnought.

What gauge of strings should I use with a Martin 12 string?

Because of the extra string tension due to the extra set of strings, Martin use a relatively light set to string up their guitars. The Martin Extra Light .010-.047 12 string are used for the factory set ups.