13 inches with the following properties: 2.5GHz Dual-core Intel Core i5, Turbo Boost up to 3.1GHz 8GB 1600MHz DDR3 SDRAM — 2x4GB, 500GB Serial ATA Drive @ 5400 rpm, SuperDrive 8x (DVD±R DL/DVD±RW/CD-RW), Mini DisplayPort to VGA Adaptor. 3 years old but in good condition. Recently replaced hard drive cable. Battery life ~ 6 hours (continuous use). Comes with keyboard protector, charger and US plug adaptor.