• glass cleaner
• towel or rag
• level
• measuring tape
• masking or painter's tape
• scissors

• clean surface
• line up sticker using level or measuring tape.
• using masking tape or blue painter's tape, secure vinyl by taping the top corners
• using masking tape or blue painter's tape tape exactly in the middle with tape running vertically top to bottom and securing vinyl to window
• peel tape off one side and fold back to center tape
• peel backer off holding tape against wall
• take pair of scissors and cut release liner
• keeping straight and tight put vinyl against wall
• squeegee vertically from middle out: middle to beyond top edge, middle to below bottom edge, then move to the left/right and repeat
• after you finish first half of sign do the same on the other side
• if it is cold get the outside (not the part against the window) wet with soapy water so it adheres better
• peel tape off vertically. Go slow.

source: apply vinyl lettering to a window