just got an ebay order from Vanzy. it was a lot of cz plugs, 4g. unfortunately, two of the 5 pair were woefully offsize. the pink ones (the ones i was most excited about) were 6g and nearly 2g. it's visually noticable. eek. the blue pair was definitely a 6g if not slightly smaller.
i'm sending them back to Vanzy today. wish me luck that their "digital calipers" tell the truth and i get my pink and blue 4gers!
the other three pair -- clear, red and black -- are just great.