All ukuleles, whether soprano or baritone are designed with standard width and tension ukulele strings. Bass strings wouldn’t fit at all. The bass strings on our bass ukulele kits require a scale length of about 19 inches, and a nut / saddle width to accommodate the girth of all 4 strings. Conveniently enough – the exact same measurements of a small classical guitar, which is the genius idea of our bass ukulele conversion kits. Buzzards Field sell a kit which allows a small classical guitar to become a short scale bass ukulele and accept bass ukulele strings.