Each piece will come with chains or other hanger to display. Pieces with jack chain can be shortened or lengthened by bending open links with any type of pliers to reach desired length. Most small hanging pieces will require hammering a nail (any nail that you can’t bend by hand) into either wall or wall above window. Heavier pieces that require more equipment will be given further instructions. I don’t recommend suction cups on windows as they often fail even with small pieces.