Trim for Stairs?

[DKAudio]

I have carpeted stairs going down to my basement. I had to add mud to many spots on the walls when I tore off the wood paneling. Because of this there are many spots where the mud and carpet don't meet nicely. Is there any type of trim that I can put on both sides of my stairs that will finish off the carpet and walls?

I was thinking about cutting large pieces like below...

However that seems like it would be hard to fit properly. Any ideas?

[HayZee518]

is your staircase like the one that is pictured? therefore the out board and inboard stringers are visible.

[DKAudio]

Here are my stairs looking down and then up.

[HayZee518]

step mouldings

any wide moldings would work, even those very detailed moldings - you'll just have to use a coping saw around the bullnose of the treads. the rest, internal and external nineties are a standard 90 degree miter cuts. you may need to touch sand the angles to make the nineties come out right unless your steps and risers are perfectly horizontal and plumb.