Sheeran designed the guitar with the luthiers at Martin and stays true to his love for Martin's LX1E Little Martin. The LX1E offers unparalleled tone from a small body guitar and continues with his mathematical-themed album cover art that adorns the guitar's headstock and the solid Sitka spruce wood top.

The guitar also features a matching blue rosette, around the soundhole, and is constructed with mahogany high-pressure laminate back and sides. The model comes stage-ready with Fishman Sonitone electronics, Martin SP Acoustic strings and a padded gig bag.

As with the first and second guitars, Sheeran is again donating 100% of his royalties from guitar sales to East Anglia's Children's Hospices, a UK-based charity in his hometown.