Size 4 in Good American equals a US Size XL. An XL in Good American fits a waist measurement of 34”-37”. PRODUCT DETAILS: Style# GLV478T “America's favorite jeans just got a major upgrade. Pull up and slip into the most innovative and inclusive jeans, period. The Power Stretch Pull-On Skinny Jeans are made from a smooth, stretchy and comfortable denim that adapts to your body's changes to guarantee the perfect fit every time. High-rise Skinny legs Faux front pockets and 2 back pockets Gap-proof waistband Reinforced belt loops Tummy smoothing technology Clean hem Medium dark blue wash” CONDITION: Great used condition. Light signs of wear. No other notable damages/flaws. MATERIAL: 81.5% Conventional Cotton 5% Recycled Cotton 4.5% Elastane 5% Recycled Polyester 4% Elastane. Machine Wash. Made in Pakistan. MEASUREMENTS- IN PHOTOS (Waist, Rise, Hips, Inseam, Leg Opening) If you have any questions, feel free to reach out and I will be happy to help. Please review the photos and measurements carefully, because returns are only accepted if something is damaged/incorrect in the listing. Generally handling time is 1-2 days. Due to different monitors/screens, color of item may vary from the image. I do my best to edit the photo so that it shows the color as accurately as possible. All measurements are taken with garment lying flat and in resting position (not stretched).