How to Choose the Right T-Shirt Size
By Serenity Forge Store | Published: 2026-10-31
Category: How-to Guides
Find your perfect unisex t-shirt fit with this step-by-step guide. Learn how to measure yourself, read size charts, and avoid common sizing mistakes.
Quick answer
To choose the right t-shirt size, measure your chest and hips, compare them to the brand’s size chart, and consider the intended fit (slim, regular, or relaxed). Always check the fabric content because shrinkage can change the fit after washing.
Why unisex sizing can be tricky
Unisex t-shirts are cut to fit a wider range of body types, but that doesn’t mean one size works for everyone. Because they lack gender-specific shaping, the same size may feel loose on a narrow frame and tight on a curvier one. That’s why measuring yourself and reading the size chart for each specific shirt is essential—especially for made-to-order tees, which may have slightly different dimensions than off-the-rack styles.
Fabric and shrinkage matter
100% cotton shirts like the Perfectly Clean Unisex T-shirt (4.3 oz., 100% combed ringspun cotton) can shrink up to 5% in length and width after the first wash, especially if dried on high heat. If you’re between sizes, consider sizing up for a relaxed fit or sticking with your normal size for a trimmer look that will still be wearable after shrinking. Pre-shrunk or blended fabrics (cotton-polyester) are more stable but always check the care label.
How to find your t-shirt size in 4 steps
- Measure your chest and hips: Use a soft measuring tape. For chest, measure around the fullest part under your armpits, keeping the tape level. For hips, measure around the widest part. Write down both numbers in inches or centimeters. Common mistake: pulling the tape too tight. It should rest against your skin without digging in.
- Check the brand’s size chart: Open the product page and find the size chart. Compare your chest and hip measurements to the chart’s body measurements, not the garment measurements. If your chest fits one size and your hips fit another, choose the larger size for a comfortable fit. Common mistake: assuming your usual size from another brand will match. Size charts vary widely, even among unisex tees.
- Decide on your preferred fit: Think about how you want the shirt to feel. For a slim fit, pick the size that matches your chest measurement exactly. For a regular fit, add 2–4 inches to your chest measurement and find that on the chart. For a relaxed/oversized fit, add 6–8 inches. Common mistake: picking a size based on your usual letter (S, M, L) without considering the intended fit of the shirt.
- Account for fabric and care: If the shirt is 100% cotton and you plan to machine dry it, expect some shrinkage. Size up if you want to maintain a relaxed fit after washing. For pre-shrunk or blended fabrics, your measured size is usually fine. Common mistake: ignoring the care label. Hot water and high heat drying cause the most shrinkage.
Product fact
- Perfectly Clean Unisex T-shirt: Made from 4.3 oz., 100% combed ringspun cotton. Combed ringspun cotton is soft and durable, but 100% cotton can shrink—so if you’re between sizes, you may want to size up for a more relaxed fit after washing.
Perfectly Clean Unisex T-shirt
