What size should I post (to my site) for 8 x 10 prints

[JR6ooo4]

Uploads to smugmug are taking longer since moving up 3 MP. I think it is time I "resize for web". What is a good size to post that will still print a nice 8x10?
I plan to leave a very loose crop so when people print 4x6, 5x7 or 8x10 there is room to adjust the print window without something or someone being cropped.

Thanks,
Mikeeee

 

[Kelly Grannell]

about 3 Mb per file approximately.

 

[JR6ooo4]

Thanks Kelly