It's fairly basic, as Milliways rooms go. Almost everything, including the carpet and the walls, has been replaced recently. There's a safe whose components are neither contemporary to Jim and Sherlock's respective times nor human-made; there aren't many people in existence who could break into it, and as far as Jim has been able to determine, none of them come to Milliways.

The dress in question, with the accompanying chemise, is hanging on a rack next to a full-length mirror. The corset and the most likely options for filling it out properly are on a nearby table.