What size Rubiks Cube?

Our grandsons would like Rubiks cubes for Christmas. Back in the day, there was only one size, but now I see several. Which size is good for a 10 year old?

Anonymous2015-11-15T14:14:46Z

there should be a regular size u see everywhere. maybe it's around 2.5 inches tall? <-srry I use metric system so not sure if this is accurate

Miles2015-11-15T14:47:04Z

3 by 3 by 3 is probably still the best :)