Don't worry, it will still hold water. Fired porcelain is extremely dense and glass like.
4.5'' tall x 2.75'' wide
opening measures: 2'' in diameter
The listing is for one vase.
The last photo shows another one of my designs, a pharmacy vase. This is perfect if your looking for something a little taller. That can be found here: https://www.etsy.com/listing/90941791/porcelain-pharmacy-bottle-vase-stamped