The collar is sewn on. The top part has buttons, making it easy to put on and take off! It has a cute silhouette, perfect for pairing with tights, and great for going out! I saw a review that said it's a bit large for a 90cm size. For your reference. ● Size: 90cm ● The color is red, but it's a calm red, not a flashy one. * Will be delivered in simple packaging.