For his electric guitars, Eric Clapton uses Ernie Ball .10 to .46 gauge strings. The action is set low.
For acoustic guitars, Eric Clapton uses Martin & Co. light gauge .12 to .54 phosphor bronze strings are used.
The type of strings used on his resonator guitars (dobros) is unknown.
In the summer of 2005, Martin & Co. began selling endorsed “Clapton’s Choice” Phosphor Bronze strings, available in light (.12 to .54) and medium (.13 to .56) gauge.