Is the Alessia watch good for everyday wear?

Yes for office and casual wear. The scratch-resistant crystal and quartz movement suit daily use. Keep it away from swimming and showers, since it is rated to only 3 ATM.

What case size should I pick?

The 32mm suits small wrists and a classic dress look. The 38mm is a middle ground for most wrists. The 42mm gives an oversized, statement look.

Does it need winding?

No. It runs on a quartz movement, so it only needs a new battery every few years.

No. It is rated to 3 ATM (30 meters), which covers splashes and handwashing but not swimming or showering.

What comes in the box?

The listing does not detail the box contents. Expect the watch itself; check with the seller for a manual or warranty card.

How does it compare with a Seiko or Citizen at the same level?

Those brands typically offer sapphire crystals and higher water resistance. The Alessia competes on its silver dial, steel bracelet and three case sizes rather than on movement specs.