1. Clothing, especially skirts, is a staple in many women's wardrobes.2. Occasionally, when purchasing skirts online, you might find that the waist is too tight, and the hassle of returning or exchanging can be daunting.3. In such instances, it is possible to alter the waist size of the skirt yourself or take it to a professional tailor for modifications.4. Methods for adjustment include adding a zipper or elastic band, or letting out the pleats to increase waist space.5. To ensure a proper fit and a flattering appearance, it's also important to consider adjustments to the hip and hemline.6. Clothes that do not fit well or feel uncomfortable should be altered to fit properly, enhancing the wearing experience.7. The specific steps to alter a skirt with elastic to increase the waist size involve: removing the waistband, preparing an appropriate length of loose elastic, and deciding the length of the elastic based on the desired waist tightness.8. Place the elastic inside the waistband, and fold the outer edge of the skirt cuttings inward to make the seams neater after stitching.9. Begin sewing, ensuring that each stitch is close together for both strength and a neat appearance.10. It is indeed possible to expand the waist of a skirt that is too small, and if you have basic tailoring skills, altering it yourself at home is a conservative option.