These are the size's i use on my sewin tube's, hope this helps.
These are treble and double's. these are just my size's.
1 1/2 to 2 inch tube size 8,
1 to 1 1/2 inch tube size 10,
1/2 to 1 inch tube size 12,

This is one of a dozen i tied last week, 1 inch tube. size 10 VMC.

1 1/2 inch with a size 6 Nash wide gaper hook.

Dai.

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