Custom curtains can ensure that you have window treatments that coordinate with your home's furnishings and decor, and which fit even the largest or most oddly-shaped window. Having custom curtains made can also mean getting curtains that are durable and that will last for years. Note a few details to consider when having custom curtains made, so you know you get window treatments you love and are happy with them for years to come:
How they drape
Not all materials will actually drape or hang the way you might expect; wool and cotton fabrics might tend to be somewhat stiff so that they don't actually hang loosely from the rod. Linen, silk, and faux silk are often the best choices for billowy curtains, as these materials tend to hang loosely, so they're easier to close and may look more attractive as well.
Curtains exposed to lots of sunlight are going to fade faster than others; for custom curtains that will be hung inside a window in the direct sun, consider having a protective backing added to the fabric. This will cut off that sunlight and keep the colours of the material true and bright.
Silk materials may actually hold heat and cold, so they may not be the best choice for insulating a room against draughty windows and bright sunlight. Cotton is a better choice for keeping out those extremes in temperature, and wool is probably the best choice for very cold climates; suede, velvet, and tweed are also good choices for insulating a room, although these materials may be at the higher end of your budget.
If you need maximum darkening in a room, note the weave of the fabric and not just the colour. A densely woven fabric, even in a lighter colour, will block lots of light. A protective backing in a solid weave can also block out sunlight, allowing you to have lighter coloured curtains while enjoying maximum darkening in the space.
The size of your curtains can actually be used to enhance the look of windows; hang curtains above the window and let the hem reach the floor, to make windows look taller. Hang them on the sides of the window frame to make the window look wider. Don't assume that curtains should fit the windows exactly, but make them larger than the window frame itself, to trick the eyes into thinking your home has big, bold windows, and to really make a visual statement with your custom curtains.