Unique Bargains via Rakuten has Washable Stretch Chair Cover for $6.49 with free shipping, you can save $1.10 with the code UBG1 at checkout.

Features include:

• Soft, comfortable and wrinkle resistant,no ironing required
• Suitable for Chair Size
• Chair Back Height: 45cm – 60cm/17 to 23 Inches;
• Chair Back Width: 35cm – 48cm/13 to 19 Inches;
• Seat Length: 38cm – 46cm/15 to 18 Inches
• 100% Brand new,easy to cleaning and wash, machine washable
• Stretchable Material,stretch that recovers quickly,secure fit with sewn-in elastic hem