Style up your relative estimation technique with the T-Shirt Size custom field! It's called Jira fashion, look it up.
Simply put, the T-shirt Sizing technique gauges the complexity of a task or project in terms of cost, time, and effort. Consequently, each Jira issue can be represented with a T-shirt that comes in sizes ranging from extra small to XXL. So, to ensure everyone understands the big picture of what needs to be accomplished, select a size that best fits the issue. Use the T-shirt Size custom field as an alternative to the numerical story points estimating method and help your team measure how much time or effort a given task will require in a simpler, clearer, and more fashionable way.