Kris:
I get my bobbins from my local car upholster for free, there are all colors lying on the floor, some are empty some are 1/2 full. they do not fit in a match case, But you can get 4 in a 35mm. film container, which are free at the local photo place. As to how much they hold, the sewing thread quite a lot, I use 50lb Gorilla line and I can get 200ft on one.

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Some people try to turn back their odometers.
Not me, I want people to know "why" I look this way
I've traveled a long way and some of the roads weren't paved