Watch the window through one full day before choosing a curtain. A bright bedroom may need a denser weave, while a living room often benefits from softened daylight rather than complete darkness.
Measure for softness
Curtains look more considered when they have enough width to form relaxed folds. Let the fabric meet the floor cleanly and place the rod high enough to give the window visual height.
Test colour in the room
A fabric changes throughout the day. Compare it beside your wall, flooring and largest furniture piece before deciding.