Ikea is a well-known retailer for furniture, appliances, and home decor. One of their main lines of furniture is beds. Do they have king size beds?
Ikea does have king size beds, but they are not the most comfortable beds that you will find. In fact, they may not be the best beds for a longterm relationship.
They are also quite expensive, so if you are looking for a bed that is going to last for a while, then you may want to look elsewhere.