The rim "thickness" of 0.9-1.2mm vs 0.4-0.8mm. All glasses are mouth-blown in the same high-quality lead-free crystal as the ultra-fine rim original series and share the same shape and volume, but is slightly "thicker". The following models are currently available:

Middy (25cl)
Schooner (35cl)
Lowballer (32cl)
Jackson (30cl)
Guldvas (55cl)

For information for enquires here.