Spoke size for Schwinn high flange single speeed free wheeler

[justrust]

I was hoping some one would know what size spokes to use to lace up a 26" 1948 Schwinn rear high flange single speed free wheeler hub, or point us in the right direction.

 

[fat tire trader]

Which 26" rim?

 

[lounging]

should be 10 5/8" for 26" S2s, drop centers, flat lobdells

 

[Dizzle Problems]

https://leonard.io/edd/

^this site is a spoke length calculator. There is also a 'how to' measure page to ensure accuracy.
In my experience, rounding down has served me best with this calculator. Example, plug in all fields and get 260.3mm as the answer. I would order 259mm spokes. If only even numbers are available, 258mm. (I do so to account for a potential small margin of error on my behalf.)
Although this forum is mostly American made bike focused, most shops, and spoke retailers, measure in millimeters, not inches. So if you go asking for 10 5/8'' spokes, they will potentially ask you what size you need in mm.
Also, amongst the videos out there, I have found this is the easiest to follow-

Source- I was the wheel builder when I worked at a shop.

 

[shawnatvintagespokes]

Here is another site from Sapim which I have used and the length I got from the site worked perfectly:
https://www.sapim.be/spoke-calculator
It has diagrams which I like because it makes it easier to understand.