This spell, when cast on the pocket of a garment, creates an access to an extradimensional space, much like a temporary bag of holding. The commodious pocket holds up to 50 pounds weight or up to a 4 cubic foot volume. If overloaded, if sharp objects are placed within, or if the spell expires, then the pocket ruptures and the contents spill at the feet of the wearer.
The effective maximum encumbrance of the pocket is 5 pounds. The same garment cannot have more than one commodious pocket. If so, it is 50% likely that each time one of them is opened that all such pockets in the garment will collapse, spilling their contents immediately. The spell can be ended instantly with the utterance of a command word, which is set at the time of casting. Note that the placement of an extradimensional space within another is often catastrophic.
The material component is a gold coin, placed in the pocket, which vanishes as the spell is cast.
Notes: Uncommon for dimensionists; otherwise, very rare. (Updated from Imagine Magazine.)