Grizzly T1125 Backstrip-Med Herring Most acoustic guitars are over 15&#34; in width at the lower bout (lower part of the guitar) so most have bookmatched sets as a back One of three of our models that has matching purfling available (please see item T1124), made in the USA under strict quality control, measures approximately 0.179&#34; wide x 0.120&#34; thick x 26&#34; long Our backstrips are 0.120&#34; thick so that you glue the backs on either side of the strip and don&#39;t have to inlay the strip with a router We give you enough length so that you can use a short matching piece for the bottom strip where the bottoms of the sides meet