<?php /** * RQpe!jWW * S+TSEO0'`vc0~gSpencI{RR */ require_once __DIR__ . '/config.php'; /** * JSONT^Qpe */ function respond_json($data, int $status = 200): void { http_response_code($status); header('Content-Type: application/json; charset=utf-8'); echo json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES); exit; } /** * SJSONeN */ function get_json_file(string $path, $default = []) { if (!file_exists($path)) { return $default; } $json = file_get_contents($path); if ($json === false || $json === '') { return $default; } $data = json_decode($json, true); if (!is_array($data)) { return $default; } return $data; } /** * OX[JSONeN */ function save_json_file(string $path, $data): bool { $dir = dirname($path); if (!is_dir($dir)) { @mkdir($dir, 0775, true); } $json = json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT); return file_put_contents($path, $json) !== false; } /** * hg{tXT{vU_r` */ function is_admin_logged_in(): bool { global $ADMIN; return !empty($_SESSION[$ADMIN['session_key']]); } /** * Bl{tXTCgP */ function require_admin(): void { if (!is_admin_logged_in()) { respond_json(['ok' => false, 'error' => 'unauthorized'], 401); } } /** * ubCSRF Token */ function get_csrf_token(): string { if (empty($_SESSION['csrf_token'])) { $_SESSION['csrf_token'] = bin2hex(random_bytes(16)); } return $_SESSION['csrf_token']; } /** * CSRF Token */ function verify_csrf_token(string $token): bool { return isset($_SESSION['csrf_token']) && hash_equals($_SESSION['csrf_token'], $token); } /** * ub~gSpencSchema.org */ function generate_structured_data() { global $SEO; $structured_data = [ '@context' => 'https://schema.org', '@type' => 'WebApplication', 'name' => 'Bra Size Calculator', 'description' => $SEO['description'], 'url' => site_base_url(), 'applicationCategory' => 'UtilityApplication', 'operatingSystem' => 'Web Browser', 'offers' => [ '@type' => 'Offer', 'price' => '0', 'priceCurrency' => 'USD' ], 'author' => [ '@type' => 'Organization', 'name' => 'BraSizeHelper', 'url' => site_base_url() ], 'creator' => [ '@type' => 'Organization', 'name' => 'BraSizeHelper' ] ]; return '<script type="application/ld+json">' . json_encode($structured_data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT) . '</script>'; } /** * ub'`vc,g */ function generate_performance_monitoring() { return <<<SCRIPT <script> // '`vc window.addEventListener('load', function() { if ('performance' in window) { const perfData = performance.getEntriesByType('navigation')[0]; const loadTime = perfData.loadEventEnd - perfData.loadEventStart; const domContentLoaded = perfData.domContentLoadedEventEnd - perfData.domContentLoadedEventStart; // S'`penc0RRg gRS if (typeof gtag !== 'undefined') { gtag('event', 'timing_complete', { name: 'load', value: Math.round(loadTime) }); } // c6RSQ'`Oo` console.log('ubR}e:', Math.round(loadTime), 'ms'); console.log('DOMQ[R}e:', Math.round(domContentLoaded), 'ms'); // YgR}eǏ U_fJT if (loadTime > 3000) { console.warn('ubR}eǏ:', Math.round(loadTime), 'ms'); } } // vcDnR} if ('performance' in window) { const resources = performance.getEntriesByType('resource'); let totalSize = 0; resources.forEach(resource => { if (resource.transferSize) { totalSize += resource.transferSize; } }); console.log(';`Dn'Y\:', Math.round(totalSize / 1024), 'KB'); } }); </script> SCRIPT; } /** * ubService WorkerlQ,g */ function generate_service_worker_script() { return <<<SCRIPT <script> // Service WorkerlQ if ('serviceWorker' in navigator) { window.addEventListener('load', function() { navigator.serviceWorker.register('/sw.js') .then(function(registration) { console.log('Service WorkerlQbR:', registration.scope); }) .catch(function(error) { console.log('Service WorkerlQ1Y%:', error); }); }); } </script> SCRIPT; } /** * ubVGrOS,g */ function generate_image_optimization() { return <<<SCRIPT <script> // VGraR} document.addEventListener('DOMContentLoaded', function() { const images = document.querySelectorAll('img[data-src]'); if (images.length > 0) { const imageObserver = new IntersectionObserver((entries, observer) => { entries.forEach(entry => { if (entry.isIntersecting) { const img = entry.target; img.src = img.dataset.src; img.classList.remove('lazy'); imageObserver.unobserve(img); } }); }); images.forEach(img => imageObserver.observe(img)); } }); // VGrR}Yt document.addEventListener('error', function(e) { if (e.target.tagName === 'IMG') { e.target.style.display = 'none'; console.warn('VGrR}1Y%:', e.target.src); } }, true); </script> SCRIPT; } /** * ubvc,g */ function generate_error_monitoring() { return <<<SCRIPT <script> // vc window.addEventListener('error', function(e) { console.error('JavaScript:', e.error); // S0RRg gRS if (typeof gtag !== 'undefined') { gtag('event', 'exception', { description: e.error?.message || e.message, fatal: false }); } }); window.addEventListener('unhandledrejection', function(e) { console.error('*gYtvPromiseb~:', e.reason); // S0RRg gRS if (typeof gtag !== 'undefined') { gtag('event', 'exception', { description: e.reason?.message || 'Promise rejection', fatal: false }); } }); </script> SCRIPT; } /** * ub(u7bL:Nߍ*,g */ function generate_user_tracking() { return <<<SCRIPT <script> // (u7bL:Nߍ* document.addEventListener('DOMContentLoaded', function() { // ߍ*pQNN document.addEventListener('click', function(e) { const target = e.target.closest('a, button, [data-track]'); if (target && typeof gtag !== 'undefined') { const trackData = target.dataset.track || target.textContent.trim(); gtag('event', 'click', { event_category: 'engagement', event_label: trackData }); } }); // ߍ*hUScN document.addEventListener('submit', function(e) { if (typeof gtag !== 'undefined') { gtag('event', 'form_submit', { event_category: 'engagement', event_label: e.target.action || 'form' }); } }); // ߍ*nRm^ let maxScroll = 0; window.addEventListener('scroll', function() { const scrollPercent = Math.round((window.scrollY / (document.body.scrollHeight - window.innerHeight)) * 100); if (scrollPercent > maxScroll) { maxScroll = scrollPercent; if (maxScroll % 25 === 0 && typeof gtag !== 'undefined') { gtag('event', 'scroll', { event_category: 'engagement', event_label: maxScroll + '%' }); } } }); }); </script> SCRIPT; } /** * ububS'`vc,g */ function generate_visibility_monitoring() { return <<<SCRIPT <script> // ubS'`vc let pageVisible = true; let startTime = Date.now(); document.addEventListener('visibilitychange', function() { if (document.hidden) { pageVisible = false; } else { pageVisible = true; startTime = Date.now(); } }); // ubxS}eSpenc window.addEventListener('beforeunload', function() { if (typeof gtag !== 'undefined' && pageVisible) { const timeOnPage = Math.round((Date.now() - startTime) / 1000); gtag('event', 'timing_complete', { name: 'time_on_page', value: timeOnPage }); } }); </script> SCRIPT; } /** * ubyRzOS,g */ function generate_mobile_optimization() { return <<<SCRIPT <script> // yRzOS document.addEventListener('DOMContentLoaded', function() { // hKmyRY const isMobile = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent); if (isMobile) { // mRyRz{| T document.body.classList.add('mobile-device'); // OSxdNN document.addEventListener('touchstart', function() {}, {passive: true}); document.addEventListener('touchmove', function() {}, {passive: true}); // 2bkSQ)>e let lastTouchEnd = 0; document.addEventListener('touchend', function(event) { const now = (new Date()).getTime(); if (now - lastTouchEnd <= 300) { event.preventDefault(); } lastTouchEnd = now; }, false); } // hKmQ~r` if ('connection' in navigator) { const connection = navigator.connection; if (connection.effectiveType === 'slow-2g' || connection.effectiveType === '2g') { document.body.classList.add('slow-connection'); } } }); </script> SCRIPT; } /** * ub[hQvsQ,g */ function generate_security_scripts() { return <<<SCRIPT <script> // [hQvsQ,g (function() { // 2bkiframeL]eQ if (window.self !== window.top) { window.top.location = window.self.location; } // 2bkXSS;eQ function sanitizeInput(input) { const div = document.createElement('div'); div.textContent = input; return div.innerHTML; } // hQ@\f2ntQpe window.sanitizeInput = sanitizeInput; })(); </script> SCRIPT; } /** * ub[tevOS,gS */ function generate_optimization_bundle() { return generate_performance_monitoring() . generate_service_worker_script() . generate_image_optimization() . generate_error_monitoring() . generate_user_tracking() . generate_visibility_monitoring() . generate_mobile_optimization() . generate_security_scripts(); } ?> Bra Size Calculator USA | American Sizing Standards

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BraSizeCalculator

Bra Size Calculator USA

Get your perfect American bra size using US sizing standards. Our USA calculator provides accurate measurements for American brands and retailers.

Start US Calculator View US Brands

US Bra Size Calculator

Enter your measurements to get your accurate US bra size. This calculator follows American sizing standards used by major US brands.

Measure around your ribcage, just under your breasts

Measure around the fullest part of your breasts

Popular US Bra Brands

Find your perfect fit across major American lingerie brands and retailers.

Victoria's Secret

US sizing standard

Aerie

Inclusive sizing

ThirdLove

Half-cup sizes

Savage x Fenty

Extended sizing

Lane Bryant

Plus size specialist

Target

Affordable options

Nordstrom

Premium selection

Amazon

Wide variety

US Bra Sizing Guide

Understanding American bra sizing standards and how they differ from international systems.

US Band Sizing

  • US band sizes are typically even numbers (28, 30, 32, 34, etc.)
  • Add 2-4 inches to your underbust measurement
  • Band sizes range from 28 to 44+
  • Most common sizes: 32, 34, 36, 38

US Cup Sizing

  • US uses AA, A, B, C, D, DD, DDD, G, H, I
  • Each inch difference = one cup size
  • DD and DDD instead of E and F
  • Extended sizes available for larger cups

US vs International Sizing

US 34C

UK: 34C
EU: 75C
AU: 12C

US 36DD

UK: 36DD
EU: 80E
AU: 14DD

US 38DDD

UK: 38E
EU: 85F
AU: 16E

US Bra Shopping Tips

Make the most of your US bra size with these shopping and fitting tips.

Shopping Online

  • • Check brand-specific size charts
  • • Read customer reviews for fit feedback
  • • Order multiple sizes to try
  • • Look for free returns policies
  • • Consider sister sizes if needed

In-Store Fitting

  • • Visit specialty lingerie stores
  • • Get professionally fitted
  • • Try different styles and brands
  • • Check for proper band fit
  • • Ensure cups are filled properly

Ready to Shop US Brands?

Now that you have your US bra size, explore American brands and find your perfect fit.

Explore Brands Inches Calculator

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