Quick Answer

To choose the right size in ARQ basics, start by measuring your chest and waist, then follow the specific fit guidance for each style. For bras, size up if you're between sizes or have a larger cup; for tanks, prioritize chest and waist measurements; for bandeaus, size down if between sizes. Always check the product details for unique recommendations.

Finding the right size in organic cotton basics can feel like a guessing game, but ARQ's consistent sizing and clear product notes make it easier. Whether you're shopping for a bra, tank, or bandeau, understanding how each style fits will save you the hassle of returns and ensure you get the comfort and support you need.

In this guide, we'll break down the sizing nuances for ARQ's most popular tops and bras. We'll cover what to measure, how each style runs, and give you concrete decision rules to follow. By the end, you'll know exactly which size to order—even if you're between sizes.

Start with Your Measurements

Before you browse, grab a soft measuring tape and take two key measurements: your chest (around the fullest part of your bust) and your waist (at your natural waistline). These two numbers will guide almost every sizing decision you make with ARQ basics. For bras, you'll also want your underbust measurement for band size, but ARQ's pullover styles are sized by S/M/L rather than traditional bra sizes.

ARQ's size chart is your best friend here. Many styles are designed to fit a range of sizes, and the product pages often include specific advice like 'size up' or 'size down.' Trust those notes—they're based on real customer feedback and the garment's intended fit. When in doubt, measure twice and order once.

  • Use a soft tape measure, not a metal one, for accurate body measurements.
  • Measure over bare skin or thin clothing for the most consistent numbers.

Sizing Bras: Full-Coverage and Bandeau Styles

ARQ bras are pullover designs, so they don't have traditional cup sizes. Instead, they're sized to fit a range of cup sizes, usually A through F. The key is to match your band and cup size to the garment's stretch. For example, the FULL-COVERAGE BRA is designed for larger cup sizes and has more fabric, so it runs true to size for most, but many customers size up for extra comfort.

The ZELDA BANDEAU, on the other hand, is more fitted and runs snug. If you're between sizes, ARQ recommends sizing down for this style. Bandeaus don't offer much support, so they're best for A–C cups or for lounging, not high-impact activities.

  • For full-coverage bras, if you have a larger cup size (E or F), consider sizing up for more room.
  • Bandeaus are meant to be snug; if you prefer a looser feel, size up instead of down.

Sizing Tanks: Crop Tanks and Camisoles

Tanks come in different fits, and ARQ's product notes tell you exactly what to expect. The CROP TANK is intentionally snug-fitting, so if you like a relaxed look, size up. It hits right around the waist, so your waist measurement matters more than your chest for the length.

The NINA TANK is a camisole shape with a wider, scooped neckline. It's cut from a 100% organic cotton rib knit that has some stretch but also holds its shape. ARQ advises prioritizing your chest and waist measurements when choosing a size for this style. If you're between sizes, go with the larger size if you prefer a looser fit, or the smaller if you want it more fitted.

  • Crop tanks: if you're between sizes and want a classic fit, choose the larger size.
  • NINA TANK: measure both chest and waist; the larger measurement usually determines the best size.

Understanding Fabric and Stretch

ARQ uses mostly organic cotton with a small percentage of spandex in many styles. This means the fabric has some give, but it won't stretch out permanently. A 92% cotton, 8% spandex blend is comfortable and retains its shape well. The 100% cotton rib knit of the NINA TANK is less stretchy and more structured, so it may feel firmer initially.

Garment dyeing and washing can also affect fit. ARQ notes that they like their clothes washed cold and line-dried, which helps preserve the fabric's integrity. Keep in mind that cotton can shrink slightly if you use hot water or a hot dryer, so follow the care instructions to keep your size consistent.

  • Wash cold and line dry to prevent shrinkage and maintain fit.
  • If a style is 100% cotton, expect less stretch than a cotton-spandex blend.

Decision Rules for Choosing Your ARQ Size

  • Measure first: Take your chest and waist measurements before ordering. For bras, also measure underbust. Write down your numbers and compare to the size chart.
  • Read the product notes: Each ARQ product page includes specific fit advice. Look for phrases like 'size up' or 'size down'. Follow the notes; they're based on real feedback.
  • Consider the style's intended fit: Crop tanks are meant to be snug, bandeaus fit snugly, and full-coverage bras have more room. Decide if you prefer a fitted or relaxed look.
  • When between sizes: For bras and bandeaus, size down if between sizes (as per ZELDA BANDEAU). For tanks, size up if you prefer a looser fit. Choose based on your comfort preference and the style's guidance.
  • Trust the fabric: Cotton-spandex blends stretch and recover; 100% cotton is less stretchy. Account for potential shrinkage by washing cold. Follow care instructions to maintain fit.

Product-Specific Fit Notes

  • FULL-COVERAGE BRA, chartreuse: The same details as our classic Wide-Strap Bra but with more fabric and a slightly different shape to accommodate for larger cup sizes. Best fits US cup sizes through F. Many people size up from their usual size in this style. If you're between sizes or have a larger cup, consider ordering a size up for a more comfortable fit without compromising support.
  • ZELDA BANDEAU, slipper: Classic bandeau shape with a dance inspired pinch-front detail. If between sizes, size down. Best fits US cup sizes A through F. This style runs snug, so if you're between sizes, choose the smaller size for a secure fit that won't slide down.
  • CROP TANK, jean: This style is snug-fitting (we like it that way!). If you prefer looser garments, size up! Order your usual size for a fitted look, but if you want more breathing room or a relaxed silhouette, go up a size.
  • NINA TANK, nutmeg: Prioritize your chest and waist measurements when choosing a size for this style. Because this camisole has a wide neckline and hits above the hip, both your chest and waist measurements matter. Use the larger of the two to guide your size.

Who Each Fit Is Best For

Best for

  • Those who prefer a snug, secure fit in bandeaus and crop tanks
  • Those with larger cup sizes (E–F) who need more coverage in a pullover bra

Not for

  • Those who prefer a loose, relaxed fit in crop tanks—size up or choose a different style
  • Those seeking high-impact support—ARQ bras are designed for everyday comfort, not intense exercise

Choosing the right size in ARQ basics doesn't have to be complicated. Start with your measurements, read the product notes, and consider the style's intended fit. When in doubt, follow the specific guidance for each piece—and remember that a little extra room in a crop tank or a snugger bandeau can make all the difference in comfort. Happy shopping!