There's no way to tell unless you let us know what the length/width is in the number of stitches. The chart design should tell you that. It may also tell you what the size is, giving you a number of samples. For instance if the design is stitched on 14 count it will be 3"x3", if stitched on 18 count it will be 2"x2". Those are only samples/suggestions. Without more specifics it's impossible to tell.