Is this real silver or silver-tone?

It is described as 999.9 fine silver, so the metal is silver, not a plated or silver-tone piece. The listing name's "silver-tone" wording refers to its color.

How big is a 2-gram silver bar?

Two grams is about a fifteenth of a troy ounce, so the bar is small enough to sit on a fingertip. Expect a piece closer to a thick stamp than a palm-sized bar.

Does it come with a certificate or assay card?

Nothing in the product details mentions a certificate, assay card or packaging. Assume it arrives as a loose bar unless the seller states otherwise.

What does the Pixiu design mean?

The Pixiu is a winged lion-like creature in Chinese folklore tied to attracting and keeping wealth. That symbolism is the main reason buyers choose this bar over a plain silver bar.

Is it a good investment?

At 2 grams the metal value is modest, and small bars usually carry a higher markup over spot than larger ones. Treat it as a collectible or gift first and a silver holding second.

Yes, but small novelty bars are harder to sell back than standard one-ounce rounds. A buyer will likely want the purity marked on the bar and may pay closer to melt.