A Pet's World offers a custom-designed collection of ribbon and made-in-the-USA Crochet Collar and Harness Enhancers, the company reports. Created to be an easy and inexpensive "add-on" sale for specialty retailers, the enhancers are also a fun way to dress up step-in harnesses and dog and cat collars, sized 3/8- to 1-in. in width, according to the manufacturer. Styles include ribbon flowers, hearts and holiday themes, as well as crochet flowers that coordinate with A Pet's World ribbon collar collection, the company adds. The enhancers attach with hook and loop closures and are sold individually.