Decalideas is a company that custom designs wall decals and stickers. They work with customers to design decals based on their ideas or by choosing from Decalideas' catalog. The design process involves the customer submitting their idea, the designer crafting a design proposal, getting the customer's approval, selecting materials, and making payments before the decal is produced and shipped. Decalideas aims to turn customers' ideas into unique decorations for their living spaces through a personalized design process.