I started with a 4ft flocked tree, I linked options here:
Walmart is the most affordable at $30! A white tinsel tree would be super fun too!
I think that next most important element is the ribbon. I did not use wire edged ribbon, simply because I couldn't find what I wanted with a wire edge. Here's the ribbon I used. The colors are subtle and it has iridescent glitter which is lovely when the lights are on.
Here's the rest of the decorations:
Paper unicorns from World Market- These were a find from last year and they don't have them this year.
White iridescent sphere ornaments- LOVE these when the lights hit them.
Pink Glitter Icicles (or unicorn horns)
White Cotton Garland - I think this would be easy to make at home too!