Size; 12.5'' x 11.5'' x 3.5''/<br><br>Support pillow comes with a removable and breathable cover<br> That provides great air circulation and allows you to sit without feeling hot or sweaty<br> This ergonomic seat cushion nicely fits most office chairs<br> Great for office use, frequent travelers, sporting events, and pregnancy<br>This cushion will help to reduce neck, shoulder, and low back pain /  Promotes healthy posture and spine alignment