Is it bigger on the inside? No, but since it is made of stained glass, all of the light gathers inside, probably creating some kind of infinity anomaly that could turn this into a real TARDIS. If Time Lords actually went to church, this is probably what their church would look like.
It was created as an art class project, by Alexandria. The top comes off, so she plans to use it as a candy jar. That’s a great idea because candy always tastes better when it comes from a TARDIS.
That’s clearly because candy ages just right after it travels through time and space. This is great work and we look forward to her future projects, which she says will have Doctor Who and Star Trek themes. Awesome job, Alexandra.