Does this curtain block out light?

No. It is unlined and light-filtering, blocking about 60% of sunlight and UV. It softens daylight and adds privacy but will not darken a room like a blackout curtain.

Is one order one panel or a pair?

It is sold per panel. For a window that needs two panels, order two.

How wide will the curtain look once hung?

The stated width is the fully expanded measurement from the first to the last pleat. The fabric gathers tightly at the pleats, so the hung panel covers noticeably less width than the flat measurement.

What hanging hardware do I need?

Adjustable pin hooks are included. You need a rod and rings or a track that the hooks attach to; the pleat count is fixed by panel width.

How do I pick the right width and length?

Divide your rod width by the number of panels you want for the width, and measure from the ring where the hook attaches down to your desired hem for the length.

Is the fabric safe for a baby's room?

The linen blend is described as hypoallergenic with a natural flax texture, which is gentle on sensitive skin. It is not treated as blackout or flame-retardant.