Bathroom storage is tight to begin with; who wants drawers that only open halfway? Or, that do manage to open completely but scrape the adjoining wall.
When using IKEA’s frameless cabinets it’s important to remember that fillers (spacers) are vital to separate the cabinet from the wall. Drawers will open completely and easily without any wall damage.
The recommended filler width is 1″ to 2”, however in cases where space is absolutely limited, then 5/8″ could do. Here’s how it should be done: