I've just located 3 paper labels, all 10 X 16 mm, all on post-Harris designs, but still earlyish and good.
I have also located a large stoppered bottle in the streaky red with blue strapping design, (some folk call it orange and green
), which has on its base the remnants of a bit of paper stuck to it. It is rectangular, with rounded corners, all the print or writing on it is long gone, I've never known whether it was a label or the remains of a price tag which might have been stuck onto it at a later date.
But it measures 13 x 8mm.
I suppose I can now safely assume it was a Mdina label, so I can tell you this size of label was being used in the late '70s into the '80s possibly, as that is when Mark's book puts this design.
Image of red with blue strapping on p. 53, described as orange with green/blue trailing, the photograph does make it look orange, it's very washed out. My pieces are all