Traditional pillow (also known as a bed pillow) is typically rectangular in shape

Slumberdown Super Support Pillows 2-Pack - Firm Bed Pillow Neck Back Shoulder Pain Relief Side Sleeper - Hypoallergenic, Comfortable UK Standard Size (48cm x...
4.0
Amazon.co.uk

Standard Luxury Pillows 4-Pack - 50x75 cm - Standard Size Hotel Quality Soft Pillow for Sleeping - Ultra-Bounce Cuddle Support Bed Pillows - Hypoallergenic...
4.0
Amazon.co.uk

Adam Home Pillows 2 Pack Hotel Quality with Quilted Cover- Premium Filled Pillows for Stomach, Back and Side Sleeper Pillow, Down Alternative Bed Pillow-Soft...
4.0
Amazon.co.uk