The Horse portrait is 2 3/8" across including the case.
The dog to the left with the bone is 1 3/16" across including the case.
The dog with the red scarf is 1 1/4" across including the case.
The dog in the green case, the image is 13/16" across in a case measuring 1 1/4".
The Horse and Rider portrait is 2 1/4" across including the case.
The dog with human collar portrait is 1 12/16" across including the case.