I source my glass from Schott. It used to be called 8625 glass, but now they are calling it VivoTag glass… not fucking kidding hahah! It’s very expensive in low qty… around $25 per tube even at 100s quantities. Here are the dimensions;
OD: ID: +/-0.03
3.05mm 2.49mm (0.28mm thick)
3.07mm 2.13mm (0.47mm thick)
3.85mm 3.19mm (0.33mm thick)
The lengths are not as important but there are various lengths available for each size. The tricky bit is the sealing and heat processes thereof, so you might not get the entire length as expected if your device is heat sensitive on that end. Also the glass itself needs some “length” to melt down to seal the end as well.
I mean… we might be able to work with anyone that wants to try to stuff some crap into some glass