Magic Wand select by object size

The Magic Wand tool should be able to select objects by size. I use photoshop for Textile Design. I am often cleaning stray pixels on my files with the Eraser or Lasso tool. It would be extremely useful if  the Magic Wand could select by amount of pixels in an object. For example: Select objects that are made up of 5 pixels. Then they can all be deleted, recolored, etc., all at once. This would save Textile Designers so much time!