Calculating shirt size from measure of brest in wordpress.

We seek a WordPress developer to build a sizing tool for apparel e-commerce. Customers often struggle to determine the proper shirt size based solely on numerical chest measurements. Your task is to create a front-end form and backend script utilizing WordPress that asks site visitors to input their bust circumference. The form would then dynamically return the corresponding shirt size based on data tables you construct. Optimization of the user experience is important, so the matching should occur seamlessly and intuitively guide the customer towards making a purchase.

Advanced skills like php, javascript, XML and mySQL are needed to fetch, process and display the size matching results on the frontend. You will need to establish a database to house the measurement-to-size mappings, then write code controlling the form submission and script output. Coding standards and accessibility must meet W3C compliance. Once complete, the tool should smoothly integrate onto existing apparel category pages without disrupting the current design. Knowledge of WordPress REST API, AJAX and responsive design preferred. Please specify your rate and availability to develop this chest size converter, with the goal of helping shoppers find the perfect fit effortlessly.