Got the Pyramid Golds today. Mounted and tuned up they measure 33 1/2" from the the ball end to the start of the silk windings and 34" from the ball end to the end of the outer flat windings. With my bridge they clear the nut with room to spare, but with a harp bridge you'd have to trim about 1/4" of the silk windings back to clear the nut.
They sound pretty good. As good or better than the other flatwounds I've tried. Definitely better than the LaBellas that were on it, but it's been a while since I had Chromes on the bass so a direct comparison is hard. The E and A are thumpier than the D and G, but I suspect that they'll need to break in for a while before things even out. They do seem to be pretty even sounding as I go up the neck. I hope the string to string balance evens out as well. I do like the tension and feel of them. Taking them out of the envelopes they were noticeably more flexible and at pitch are definitely lighter tension, but they don't feel floppy on the bass like the TI flats did to me.
We'll see how it goes, but I did like the sound I was getting with the D'Addario Half Rounds, though the over all sound was more generic in general. Some of that is due to my bridge and that's a work in progress too, so it all may change in the future.