Perfect Size?

[Action Shooter]

Hey All,
I am still currently in the amateur stages in the art of photography and
was curious.
Is there a "perfect setting" for photo uploads that I bridge via my website to my Smugmug account.
(no cropping needed if uploaded at particular setting?)
Either by size H x W or Pixels and at what DPI ?
I would rather that my customers not have to adjust the photos and what they see is what they get.
Sorry if this is a stupid question.... but I gotta learn somewhere.:dunno

Thank you,
the other Andy

[Andy]

There is no perfect size. Upload the largest size possible (all the original pixels is best IMO). This way, you can sell or print any size we offer.

Save As in photoshop, jpg level 10, which is lab quality, and you're good to go.

Choice is good.