Some customers wrote in their reviews that it was thin. Macworld.co.uk wrote “Remarkably thin and light for a machine with laptop guts” in their review. Macworld.co.uk also said “The Surface Pro 3 is thinner and lighter than the previous two versions, despite having a larger 12inch display”. Macworld.co.uk also mentioned “Thinnest, lightest Core Intel tablet we've seen”.
One Microsoft Surface Pro 3 reviewer said in their reviews that it was lightweight. Macworld.co.uk wrote “Screen, very good keyboard cover, useful stylus and handwriting recognition, lightweight” in their review.