This PJ set requires no assembly or complex setup; it is ready to wear straight out of the packaging.Compatibility: Refer to the size guide for accurate sizing to ensure a comfortable fit. The available sizes are X Small (UK 6), Small (UK 8-10), Medium (UK 12-14), Large (UK 16-18), X Large (UK 20-22), and XX Large (UK 24-26).Care: To preserve the luxurious feel and appearance of the satin material, delicate care is recommended. Info needed: [Specific washing temperature, drying instructions, and ironing recommendations. Always refer to the product's care label for definitive instructions.] Generally, satin benefits from gentle washing, either by hand or on a delicate machine cycle with cold water, and air drying to prevent damage to the fabric.