The Eco Jogger by Miakoda New York has a slim fit that is perfectly polished but cozy and can easily be dressed up or down.

Fabric Content: soy, organic cotton, spandex
Features: 2" waistband (no pinching or squeezing!) with elastic and drawstring. Fitted cuff at ankle (no elastic on cuff)
Made ethically in NYC

Model is 5' 3", 128 lbs and wearing an XS.

Sizing:
XS- 25.5" waist unstretched
S- 26.5" waist unstretched
M- 27.5" waist unstretched
L- 28.5" waist unstretched