We have the O2 Revolution in blue - here's the link to my review link

Follow-up - we don't use it as much I thought we would. My wife is fairly finicky. I not only have to pick the right toy - but the right time and one this large is on the 'have to be in the mood' list. You have to be warmed up to take a full 2" dia 6.3" circumference straight on. I always warm her up with something more modest and off course use plenty of lube before going for the O2.

We still recommend highly it - you'll love the silky feel. less

Yours is 6.3" in circumference? Mine measures exactly 5 3/4" around at the biggest part. There must be quite a bit of variation from unit to unit. Mine also isn't that squishy. My O2 Rascal has a lot more O2 material and measures 1/2" bigger around than the specs.

I would say though, its totally worth it. less

Tuesday - we agree that it's worth it. Just to be sure I rechecked the measurements. Mine is just a hair under 2" in diameter. Measuring several several times around the head - near the base where a mans frenulum would be, I get a circumference of 6 to 1-1/8". Because the O2 tapers, where you measure matters. At the base I measure only 1.5" diameter and a little over 5" circumference - which takes into account the veining effect. 1/2 way down the shaft I get a 5.5" circumference.

While measuring I checked the length again as well - i get 7.5"-7.75" inseratble.

BTW - getting tired of writing 'diameter' & 'circumference' - tried to find a symbol - apparently there is no typical Greek symbol for the term - just the capital letter 'C' - so from now on, I'll just use D=diameter & C=circumference. less