I suppose the same question could be rephrased to ask what’s the machine’s capacity?
I ordered a Precision Pro after I broke one of the latches on my old vac/sealer. And I’m certain the 3.5" roll I’ve been using won’t fit. But I’ll probably end up using it anyway.
This forum isn’t monitored by Anova, & their CS people are next to useless, so unless someone chimes in, it likely won’t be answered, sorry.
You tried reddit?
Haven’t tried Reddit, no. Do you have a guess? I think its 2.75", but I’d like to be sure before spending the money.
Thanks for the reply, anyway.
You are most welcome, people get “mardy” here not getting an answer from anova, which is why I try to intercept a few & point in the direction of other possibilities.
The sous vide reddit is good but nasty, & very repetitious, but if you get the detail you need, maybe worth visiting, just be prepared for anything at any time.
LOL!
If I really want to see the sparky in people, I need only innocently post a question along with an example of my work to a photo forum. They come out like school of piranha eager and ready to point out the flaws. Never mind it was a professional production. 
Peace.
3 ½” does seem a bit thick. I use Food Saver brand rolls, carried at my farmer’s BigBox store, without issue.
You’re correct. 3 ½” is a bit thick by an inch.
The Anova Pro that I just got came with a roll that’s just under 2 ½”. From there, I set out in search of biodegradable rolls which I found on eBay. I got two at 11"X20’ for $10.
Happy camper.
Good! Please tell us about biodegradable thermo seal vacuum bags.
Not much to tell, other than my strange brand of luck. The brand of rolls/bags is VestaEco. The box I bought is the only one I’ve seen that explicitly says “Biodegradable.” There’s a small smattering of this brand on Amazon. But I only saw “Compostable”. If I weren’t looking, I wouldn’t have known there were four or five categories of “compostable.”
The biggest error I made was in trying to guess the diameter of a roll from the 20Ft. length. It doesn’t work with these because they’re kind of …fluffy. Other than that, they’re a slightly greenish color and have an area for writing on. And a different texture than I’m used to. If, after I’ve had a chance to use them and find anything noteworthy, I’ll report back here.
Interesting. It is Polylactic acid , also more properly known as poly (lactic acid ).
The Wikipedia has an extensive article. PLA is compostable and biodegradable at rates varying with the composition.
I’ll have to check but Milady Wife may have picked up a box of PLA zip seal bags.
Thank you.