CUSTOMIZE NIKE SHOES WITH NIKEiD. NIKEiD allows you to customize Nike shoes for performance, fit, and style. Visit NIKEiD to view all customizable products.ou can add a Personalized iD (PiD) to most NIKEiD products. The number of characters varies by style. Enter your PiD in the iD field, and hover over the field to view the characters allowed for the product you selected. Nike is unable to honor all submissions. Please review the personalization policy.