Kids and Babies Clothing Buying Guide: Sizes and Fabrics
By Thunderpants - New Zealand made | Published: 2026-10-16
Category: Buying Guides
Use your child's measurements, not age labels, to buy kids and babies clothing that lasts. Learn fabric choices, size rules, and Fairtrade options.
Quick answer
Buy by your child's current measurements, not by age or generic size labels. For babies, prioritize soft cotton and simple fastenings; for kids, choose durable fabrics like cotton drill and allow room to grow. Fairtrade options such as Thunderpants Kids Tank Hot Pink and Longline Crop Horses offer traceable cotton and consistent sizing, so you can shop with confidence.
Measure first, then match to the size chart
Age labels vary between brands, so always measure your child's chest, waist, and height. Compare those numbers to the specific product's size chart. For example, the Kids Tank Hot Pink lists shoulder-to-hem lengths: small 39cm, medium 43cm, large 47cm. If your child is between sizes, size up for longer wear, especially if the fabric has little stretch.
Choose fabrics that suit the season and the child
Cotton is breathable and soft, making it a good default for babies and kids. Cotton drill is a tighter weave that resists wear, ideal for pants and dresses that see heavy play. For underwear and crops, look for Fairtrade organic cotton, which supports sustainable farming and feels gentle on skin. Avoid synthetic blends if your child has sensitive skin or if you want maximum breathability.
Plan for growth without buying too big
Kids grow fast, but clothes that are too large can be unsafe (especially for babies) and uncomfortable. A good rule: allow one size up for tops and dresses if the brand's measurements suggest room to grow. The Kids Tank Hot Pink is designed to grow with your child over years, so it can be a smart multi-season layer. For bottoms, a slightly adjustable waist or a relaxed fit helps bridge sizes.
Check the details that affect comfort and safety
For babies, look for flat seams, tagless labels, and no loose buttons or drawstrings. For kids, deep pockets and simple fastenings encourage independence. The MADE TO ORDER FROCK - SMALL has a loose yoke design with deep pockets and no zips or fastenings, making it easy for kids to put on themselves. Always follow care labels to keep fabrics in shape.
Decision rules for buying kids and babies clothing
- Rule 1: Measure, don't guess: Take fresh measurements of chest, waist, and height. Compare to the product's size chart, not the age on the tag. If between sizes, size up for tops and dresses; for babies, choose the smaller size if the next size up is much larger.
- Rule 2: Match fabric to use: For everyday play, choose durable cotton drill or thick cotton. For sleep and layering, choose soft, breathable cotton jersey or rib. Avoid heavy fabrics for babies who are not yet mobile; they can restrict movement.
- Rule 3: Prioritize easy dressing: Look for stretchy necklines, flat seams, and simple fastenings. Dresses with no zips or buttons, like the MADE TO ORDER FROCK, help kids dress themselves. For babies, avoid long drawstrings and loose buttons; for kids, choose pockets and elastic waists for independence.
- Rule 4: Consider growth and longevity: Some pieces, like the Kids Tank Hot Pink, are designed to grow with your child. Check the length measurements to see how many seasons you'll get. If you want hand-me-down potential, choose classic colors and durable fabrics like cotton drill.
- Rule 5: Check Fairtrade and care labels: Fairtrade certification means the cotton was grown and traded under fair conditions. Follow washing instructions to prevent shrinking and stretching. Wash in cold water and line dry when possible to extend the life of organic cotton.
Product facts
- Kids Tank Hot Pink: Kids Tank Hot Pink: measuring from the shoulder to the hem, approximate lengths are small 39cm, medium 43cm, and large 47cm. These tanks tend to grow with your child over the years. Use the length measurements to decide if the tank will fit now and allow room for growth; the longer length may suit taller kids or layered looks.
- MADE TO ORDER FROCK - SMALL (size 12 - 16): MADE TO ORDER FROCK - SMALL (size 12 - 16) is a loose fitting yoke dress with deep pockets, no zips or fastenings, made from 100% Fairtrade organic cotton drill. Allow up to 2 weeks for dispatch. The simple design makes dressing easy for kids, and the durable cotton drill stands up to play; plan ahead for the made-to-order timeline.
- Longline Crop Horses: Longline Crop Horses features a double layer at the front, a flatter seam at the bottom, and more room for bigger busts than the Original Crop Top. It can add compression to smaller busts. If your child needs a crop for sports or everyday wear, this style offers more coverage and support; the double layer may feel snug on smaller frames.
Fit guidance: who this advice is for
Best for
- Parents who want clothes that fit well and last through growth spurts
- Shoppers looking for Fairtrade and organic cotton options for kids and babies
Not for
- Shoppers who need same-day dispatch (made-to-order items take up to 2 weeks)
- Those looking for synthetic performance fabrics or compression wear for sports
