These are high quality, white in colour and thick. Good size for a pillow, enough to fit a high/fluffy pillow but not slip around. We have them on a medium profile pillow and they fit well.
This is the first silk pillowcase I have owned and am very happy with the product. Soft touch, it truly does feel silky smooth on your face as you lie down. My hair is also evidently less frizzy in the morning. Have only washed once so cannot comment on washable quality.