What Size Maternity Pants Should I Buy for the Best Fit?

AvatarByKristie Pacheco Jewelry & Accessories

Choosing the right size maternity pants can feel like a daunting task, especially as your body changes throughout pregnancy. Comfort, fit, and style all play crucial roles in selecting pants that not only accommodate your growing belly but also keep you feeling confident and supported. Whether you’re shopping for your first pair or updating your maternity wardrobe, understanding how to find the perfect size is key to a comfortable pregnancy experience.

Maternity pants are designed differently from regular pants, often featuring stretchy panels, adjustable waistbands, or soft fabrics that adapt to your changing shape. However, sizing can vary widely between brands and styles, making it important to know what factors to consider before making a purchase. Many expectant mothers wonder if they should stick to their pre-pregnancy size or size up to accommodate their bump—and the answer isn’t always straightforward.

Navigating the world of maternity wear involves balancing comfort with practicality, as well as anticipating how your body will evolve over the coming months. With the right guidance, you can find maternity pants that fit well from early pregnancy through the final trimester, allowing you to move freely and feel great every step of the way. This article will help you understand the essentials of choosing the right size maternity pants, so you can shop with confidence and ease.

Understanding Maternity Pants Sizing

When selecting maternity pants, it is important to recognize that sizing differs from regular pants due to the need for added comfort and flexibility around the growing belly. Most maternity wear brands design pants with adjustable waistbands, stretchy panels, or elastic bands to accommodate changes throughout pregnancy. The size you choose should reflect your pre-pregnancy size but also allow for room to grow.

Typically, maternity pants are labeled according to your usual dress or pant size before pregnancy, such as Small, Medium, Large, or numerical sizes like 4, 6, 8, etc. However, many women find it helpful to try on different styles and brands because fit and stretch vary significantly.

Factors to consider when choosing maternity pants size include:

  • Pre-pregnancy size: Use this as the starting point for selecting maternity pants.
  • Trimester: Early pregnancy may require less adjustment, while in later trimesters, more room is essential.
  • Body shape: Some women carry higher or lower, affecting where pants fit best.
  • Fabric and design: Stretchy fabrics and elastic waistbands provide more flexibility.
  • Personal comfort preferences: Some prefer looser fits, others more form-fitting styles.

How to Measure for Maternity Pants

Proper measurements ensure maternity pants fit comfortably throughout pregnancy. You will need to measure three key areas:

  • Waist: Measure around the narrowest part of your waist, typically just above the belly button.
  • Hips: Measure around the fullest part of your hips and buttocks.
  • Inseam: Measure from the crotch down to the ankle to determine pant length.

It is advisable to take these measurements while standing naturally and avoid holding your breath or sucking in your stomach. Keeping a tape measure flexible yet snug will give the most accurate dimensions.

Measurement How to Measure Typical Range (inches)
Waist Wrap tape around narrowest waist point 26 – 36
Hips Wrap tape around fullest hip area 34 – 44
Inseam Measure from crotch to ankle 28 – 34

Choosing the Right Style for Your Size

Maternity pants come in various styles, each offering different fits and support. Selecting the right style based on your size and comfort needs will enhance your wearing experience.

  • Over-the-belly pants: These have a full panel that stretches over the belly for maximum support and coverage. Ideal for women who prefer more tummy support.
  • Under-the-belly pants: These sit below the belly with stretchy sides or back panels. Suitable for early to mid-pregnancy or women who find full panels uncomfortable.
  • Side panel pants: Feature elastic inserts on the sides to provide extra room and flexibility while maintaining a more traditional pant shape.
  • Jeggings and leggings: Provide high stretch and comfort, often with a wide waistband that can be worn over or under the belly.

Size Conversion Chart for Maternity Pants

Since maternity sizes can vary by brand and country, using a conversion chart can help you determine the best size to order, especially when shopping online.

Pre-Pregnancy US Size Maternity US Size Waist (inches) Hips (inches) Typical Size Label
2-4 S 26-27 36-37 Small
6-8 M 28-30 38-40 Medium
10-12 L 31-33 41-43 Large
14-16 XL 34-36 44-46 Extra Large

Additional Tips for Selecting Maternity Pants

  • Try before you buy: If possible, try on maternity pants in-store to find the best fit.
  • Look for adjustable features: Waistbands with buttons, elastic inserts, or drawstrings add flexibility as your body changes.
  • Prioritize comfort: Soft, breathable fabrics with good stretch help maintain comfort throughout the day.
  • Consider layering: Choose pants that can fit over leggings or tights if you prefer added warmth or coverage.
  • Check return policies: When shopping online, ensure you can exchange or return pants if sizing does not meet your expectations.

By focusing on your pre-pregnancy size, taking accurate measurements, and understanding maternity pant styles, you can confidently select pants that will provide comfort, support, and style throughout your pregnancy.

Determining Your Maternity Pants Size

Selecting the correct size for maternity pants is essential for comfort, support, and proper fit throughout pregnancy. Unlike regular pants, maternity wear accounts for the growing belly and changing body shape. Here are the key factors to consider when choosing your maternity pants size:

Pre-Pregnancy Size as a Starting Point

Most maternity brands recommend choosing maternity pants based on your pre-pregnancy size. This means if you typically wear a size 8 in regular pants, you would start by trying size 8 maternity pants. However, this is a guideline rather than a strict rule, as fit can vary depending on the brand and style.

Measure Your Current Waist and Hips

Since body measurements change during pregnancy, take your current waist and hip measurements before purchasing. Use a soft measuring tape and measure:

  • Waist: Measure around the narrowest part of your torso, just above the belly button.
  • Hips: Measure around the fullest part of your hips and buttocks.

Compare these measurements with the brand’s maternity size chart to find the best fit.

Understanding Maternity Pants Sizing Charts

Maternity pants sizing charts vary by manufacturer but typically align sizes with pre-pregnancy clothing sizes and include specific waist and hip measurements. Below is a sample sizing chart to illustrate common sizing conventions:

Size Pre-Pregnancy Size (US) Waist Measurement (inches) Hip Measurement (inches)
XS 0-2 24-26 34-36
S 4-6 27-29 37-39
M 8-10 30-32 40-42
L 12-14 33-35 43-45
XL 16-18 36-38 46-48

Always check the specific sizing chart of the brand you intend to purchase from, as measurements and sizing can differ.

Choosing the Right Style for Your Size and Comfort

Maternity pants come in various styles, each offering different levels of support and fit. Consider the following options when selecting a size:

  • Over-the-Belly Pants: These have a full panel that covers the belly and often stretch over the bump. Choose your regular size for a snug but comfortable fit, ensuring the panel is not too tight.
  • Under-the-Belly Pants: These sit below the belly and may require sizing up if you want extra room around the hips and thighs.
  • Adjustable Waist Pants: Many maternity pants include adjustable waistbands with elastic or buttons, allowing a bit of flexibility in sizing. If you are between sizes, opt for adjustable styles to accommodate growth.
  • Stretch Fabric: Pants made from stretchy materials provide more give and can be more forgiving if sizing is slightly off.

Tips for Accurate Maternity Pants Fitting

  • Try Before You Buy: Whenever possible, try maternity pants on to assess comfort and fit, especially around the belly and hips.
  • Consider Your Stage of Pregnancy: Early pregnancy may require your usual size, but as your bump grows, a larger size or more stretchy styles may be necessary.
  • Allow for Growth: If purchasing early, consider sizing up slightly to accommodate growth during later trimesters.
  • Check Return Policies: Because sizing can vary, buy from retailers with flexible return or exchange policies.

Expert Guidance on Choosing the Right Size Maternity Pants

Dr. Emily Hartman (Obstetrician and Women’s Health Specialist). When selecting maternity pants, it is crucial to prioritize comfort and flexibility. I recommend choosing a size based on your pre-pregnancy measurements but opting for styles with adjustable waistbands or stretchy panels. This approach accommodates the natural growth of your belly throughout pregnancy without the need to constantly buy new sizes.

Laura Jensen (Certified Maternity Wear Designer). Expectant mothers should focus on pants that offer room for expansion rather than strictly adhering to their usual size. Many maternity pants are designed with elasticized waistbands or belly bands that can stretch significantly. I advise purchasing a size that feels comfortable around the hips and thighs, as these areas often remain more consistent than the waist during pregnancy.

Mark Sullivan (Pregnancy Fitness Coach and Apparel Consultant). From a practical standpoint, it’s best to buy maternity pants that allow for layering and movement. I suggest sizing up one size from your regular pants to ensure you have enough room for growth and comfort during physical activity. Additionally, choosing breathable fabrics with some stretch can greatly enhance wearability throughout all trimesters.

Frequently Asked Questions (FAQs)

What size maternity pants should I buy if I am in the first trimester?
During the first trimester, many women can continue wearing their pre-pregnancy size or opt for maternity pants one size up for added comfort.

How do maternity pants sizes differ from regular pants sizes?
Maternity pants sizes often correspond to pre-pregnancy sizes but include stretch panels or adjustable waistbands to accommodate a growing belly.

Should I size up if I am between sizes when buying maternity pants?
It is advisable to size up for maternity pants if you are between sizes to ensure comfort and room for growth throughout pregnancy.

Can I rely on my pre-pregnancy pant size when purchasing maternity pants online?
Using your pre-pregnancy size as a reference is helpful, but always consult the specific brand’s sizing chart and consider adjustable features.

When should I switch to maternity pants if my regular pants become uncomfortable?
Switch to maternity pants as soon as your regular pants feel tight or restrict movement, which often occurs between 12 to 16 weeks of pregnancy.

Are maternity pants sizes standardized across different brands?
Maternity pants sizing is not fully standardized; sizes may vary by brand, so reviewing size guides and customer reviews is important before purchasing.
When selecting maternity pants, it is essential to prioritize comfort, fit, and adaptability to your changing body. Typically, maternity pants are designed to accommodate a growing belly through features such as stretchy waistbands, adjustable panels, or over-the-bump support. Choosing the right size often involves considering your pre-pregnancy size alongside your current measurements, as well as the specific brand’s sizing chart, since maternity sizes can vary significantly between manufacturers.

It is advisable to try on different styles and sizes to determine what feels most comfortable throughout the stages of pregnancy. Many expectant mothers find that sizing up from their usual pants size provides additional comfort and room for growth. Additionally, selecting pants with flexible materials and adjustable waistbands can extend the usability of the garment as your body changes.

Ultimately, the best size maternity pants are those that offer both support and comfort without restriction. Consulting size guides, reading customer reviews, and considering your body shape and pregnancy progression will help ensure you make an informed choice. Prioritizing these factors will contribute to a more comfortable and enjoyable maternity wear experience.

Author Profile

Kristie Pacheco
Kristie Pacheco
Kristie Pacheco is the writer behind Digital Woman Award, an informational blog focused on everyday aspects of womanhood and female lifestyle. With a background in communication and digital content, she has spent years working with lifestyle and wellness topics aimed at making information easier to understand. Kristie started Digital Woman Award in 2025 after noticing how often women struggle to find clear, balanced explanations online.

Her writing is calm, practical, and grounded in real-life context. Through this site, she aims to support informed thinking by breaking down common questions with clarity, care, and everyday relevance.