A Beginner's Guide to Buying Underwear Online

Quick Answer

When buying underwear online, focus on getting accurate measurements, understanding fabric properties, and choosing styles that match your daily needs. Start with a set or multi-pack to test fit and comfort before committing to a larger purchase.

Shopping for underwear online can feel like a leap of faith, especially when you can't try things on before buying. But with the right approach, you can find pieces that fit well and feel great without leaving your home.

This guide walks you through the key steps: measuring yourself correctly, decoding size charts, picking fabrics that suit your lifestyle, and choosing styles that work for your body and wardrobe. By the end, you'll know exactly what to look for and how to avoid common online shopping pitfalls.

Start with Accurate Measurements

The foundation of any successful online underwear purchase is knowing your measurements. For bottoms, use a soft measuring tape to measure your waist at its narrowest point and your hips at the widest part. For bras, measure your underbust and the fullest part of your bust. Write these numbers down and keep them handy.

Most brands provide size charts that map measurements to sizes. Don't skip this step—even if you've bought the same size from another brand, sizing can vary. For example, a size medium from one brand might fit like a small in another. Always compare your measurements to the specific brand's chart.

• Measure yourself in the morning when your body is less likely to be bloated.
• If you're between sizes, consider sizing up for comfort, especially for all-day wear.

Understand Fabric and Features

Fabric plays a huge role in how underwear feels and performs. Natural fibers like cotton are breathable and absorbent, while synthetic blends offer stretch and moisture-wicking properties. More innovative options, like TENCEL™ derived from trees, combine softness with breathability and are often more sustainable.

Look for features that address your specific needs. For example, if you're prone to irritation, a gusset with soothing properties can make a difference. Some brands incorporate zinc oxide into their gussets to help keep you feeling fresh. If you experience sensitivity or bloating, wide waistbands and flexible designs offer more comfort.

• Check the fabric composition: higher natural fiber content often means better breathability.
• Look for seamless or low-pressure seams if you dislike visible lines or chafing.

Choose Styles Based on Your Needs

Different underwear styles serve different purposes. Thongs are great for avoiding visible panty lines under fitted clothing, while bikinis and briefs offer more coverage and a classic look. For lounging or sleeping, you might prefer a looser style like boyshorts or boxers.

Consider your wardrobe and daily activities. If you wear a lot of leggings or tight pants, a seamless thong might be your go-to. If you're active, look for styles with secure fits and moisture-wicking fabrics. Think about the rise too: high-rise offers more coverage and support, while low-rise sits below the waist.

• For seamless looks, choose thongs with low-profile edges.
• For sensitive stomachs, opt for crossover or high-rise styles that don't dig in.

Read Reviews and Product Details Carefully

Online reviews are a goldmine of information. Look for comments about sizing accuracy, fabric feel, and durability from customers who share your body type or preferences. Pay attention to any recurring complaints about fit or quality.

Also, read the product description thoroughly. Note details like whether the item is lined, the type of hardware, and the care instructions. For bras, check the level of support and whether it's adjustable. For underwear, see if it's single-layer or has special features like full-coverage gussets.

• Filter reviews by size or body type to find the most relevant feedback.
• If a product has very few reviews, consider reaching out to customer service with specific questions.

Decision Rules for Buying Underwear Online

• Measure first: Always take your waist, hip, and bust measurements before browsing. Compare them to the brand's size chart, not your usual size. Accurate measurements are your best defense against poor fit.
• Fabric matters: Choose breathable, natural fibers like TENCEL™ for everyday wear. For active days, look for moisture-wicking properties. Fabric affects comfort and hygiene, so prioritize it.
• Style for your life: Think about your typical outfits and activities. Thongs for no lines, bikinis for comfort, high-rise for support. Pick styles that solve your specific wardrobe challenges.
• Start with a set: When trying a new brand, consider a multi-pack or set to test different styles at once. This helps you understand their sizing and your preferences. Sets are cost-effective and reduce the risk of buying a single style that doesn't work.

Products to Consider

• Dipped Thong: This hybrid-rise thong sits high on the hips and dips low in the front & back for a flattering high-leg V-shape. The wider hip prevents digging in or slipping down, while the single-layer design and low-pressure seams make for an airy, barely-there feel. If you're new to thongs, the wider hip and low-pressure seams reduce the risk of discomfort, making it a great starting point for online purchases.
• Crossover Thong: This easy-to-wear mid-rise thong dips low in the front for a flattering v-shape. The soft, wide waistband and crossover detail offer flexibility and space for sensitive or fluctuating abdomens through various life stages or day-to-day body changes. For those with a sensitive stomach or who experience bloating, the crossover design prevents digging and offers adaptive comfort, ideal when you can't try before buying.

Fit Guidance

Best for

• Online shoppers who want a seamless look under fitted clothing, as thongs like the Dipped Thong offer a barely-there feel.
• Those with sensitive or fluctuating abdomens who need flexible waistbands, like the Crossover Thong's design.

Not for

• If you prefer full coverage or dislike the feel of a thong, consider bikini or brief styles instead.
• If you need high-impact support for intense workouts, you might want a more structured bra or underwear with more support.

Buying underwear online doesn't have to be a gamble. By taking accurate measurements, understanding fabric and features, and choosing styles that fit your lifestyle, you can find pieces that feel like they were made for you. Start with a set to test the waters, and soon you'll be shopping with confidence.