I bought size 5 for my 5 year old daughter who is 48" and medium height. Size 5 usually fits him perfectly. They have plenty of room for litter (and they grow too much), but they're a few inches shorter!
Premium Organic Cotton Girls' Clothing by Hope Henry Riding: Sustainable and Stylish Fashion
33 Review
School Uniform Pants & Capris for Girls - Premium Skinny Stretchable Clothing
40 Review
French Toast Girls Skinny Pocket Girls' Clothing for Pants & Capris
31 Review
Girls' Straight Leg Pant by French Toast
32 Review