Preheat the oven to 425°F (218°C).
Thread the 1-inch chicken pieces onto skewers, leaving a little space between pieces for even cooking, and arrange the skewers on a rimmed baking sheet.
In a measuring cup or small bowl, whisk together the balsamic vinegar, Worcestershire sauce, soy sauce (or coconut aminos), honey, red pepper flakes, and minced garlic until combined.
Pour the marinade evenly over the skewered chicken, turning the skewers to coat all sides.
Bake the skewers in the preheated oven for 25 minutes, until the chicken is cooked through and reaches an internal temperature of 165°F (74°C).
Remove from the oven and serve the skewers hot.