String lights & mason jars - need opinions pls

Two decor questions:
1. We plan on using two lines of string lights to form an X above us at the reception. From balcony to balcony, it’s 31 feet. So I think we’ll need two boxes of like, 35 ft each? Anyone have any suggestions on where to get the lights? I’m looking at Canadian tire and I don’t even know if we should get Edison lights where you only get 10-15 lights per string (and they are expensive) or should we opt for Christmas style lights instead? I plan on wrapping fake garland around them so the type of lights won’t be super noticeable..

2. We are doing mason jars for centrepiece vases and I don’t know if we should get the 1L or if that’s too small and get the size up (I forget the exact size). Any recommendations?? The tables are 9x3 ft