Hard to see the shape from the picture, which seems to be taken from quite a low angle, and I can't make out the bubbles very clearly either. However, the shape you describe is similar to the shape of WMF Perlora 8201, which came in green, topaz, and gold ruby (goldrubin). The bubbles on Perlora are quite small and very regular. I'll attach a picture of mine in topaz. However, the 1951 catalogue of WMF (shown in the WMF book by Burschel and Scheiffele) has the height at 14 cm, 5 1/2 ".
Have a look and tell us what you think.