A mirror, basin and door can take up much of the wall space in a cloakroom. Start by finding the clear, dry area you can see from the doorway. A pattern or a larger image can have its clearest place there, with the details you like in view rather than behind the mirror.
First, choose a wall suitable for wallpaper
The wallpaper should go where it stays away from direct water contact. The wall directly behind the basin gets splashed, so we would leave that area out. If the room has a shower, keep the wallpaper outside surfaces exposed directly to water there too.
Premium and Premium Textured can be used on suitable surfaces in well-ventilated rooms with occasional humidity. The surface must be clean, fully dry and properly prepared. Read our bathroom and kitchen wallpaper advice for materials, placement and preparation.
Once you have chosen a suitable dry area, you can start with the design. Open and close the door, and see how much of the wall shows in both positions. A small, clear side wall may be a better place for the image than a larger wall hidden by the fittings.
A repeating pattern works on interrupted surfaces
Magnolia Season is one of our most ordered classic designs. White flowers and winding branches repeat against a light blue background. We would look at it when several smaller, dry wall sections should share the same pattern.
The flowers can reappear across the different areas without each wall needing room for a complete picture. If the room has panelling or tiles on the lower walls, judge the pattern for the clear area above. Let the existing edges help you choose where the wallpaper should start and stop.
Check how the pattern appears in the mirror too. You may see a different part of the wall there than you do from the doorway. Those are two useful views to compare in a small room.