How much do your piano/keyboard weigh, and what about the dimensions? Support May 18, 2016 03:47 Updated Follow Dimensions Weight The ONE Smart Piano 54x18x33 in. 115 lbs. The ONE Light Keyboard 36x13x4 in. 11 lbs. Related articles What happens if I receive the product damaged or broken? How long will it take to ship my piano/keyboard? Do you ship to my country? What is your return policy? Could you compare the one smart piano sound to real piano sound? Comments 0 comments Please sign in to leave a comment.