Children’s T-shirt patterns

Sewing patterns for children’s T-shirts: choosing the right design based on age and technique

The T-shirt is often the first item people sew for a child, and for good reason: few pieces to assemble, no zip, and the finished garment can be worn the very next day. But ‘simple’ doesn’t mean ‘no choices to make’. Whether you choose a bias-cut neckline, a ribbed collar, raglan sleeves or set-in sleeves, these options have a real impact on how the garment fits and the difficulty of the project.

Raglan, set-in or kimono sleeves: what each style really entails

Raglan sleeves are the most common choice for beginners working with children’s jersey, and for good reason: the absence of a shoulder seam eliminates the complexity of attaching the sleeves to the armholes. A raglan T-shirt is sewn from four pieces (front, back, two sleeves), and a beginner can complete one in 90 minutes. Set-in sleeves give a more fitted cut and a better fit on the shoulder, but they require careful control of the curve lengths to ensure the two armholes join without unwanted puckering. For children under 4, the kimono style is well worth considering: no diagonal seams, and the naturally wider neckline makes it easier to slip the T-shirt over the head.

A4 or A0 PDF format: a question of materials, not quality

The PDF children’s T-shirt patterns are available in two formats. The A4 format requires the sheets to be assembled (between 6 and 20 pages depending on the size printed), which takes 15 to 30 minutes but only requires a home printer. The A0 format is printed on a single sheet at a print shop, costing between 2 and 5 euros depending on the provider, and avoids any need for assembly. For a one-off project, A4 is sufficient. For sewing the same pattern in several sizes or multiple times throughout the year, a laminated A0 sheet quickly becomes cost-effective. Patterns may or may not include seam allowances, depending on the designer: check this before cutting out, as failing to allow for a 1 cm seam allowance on jersey fabric can distort the final result.

Sewing jersey without an overlocker: practical settings for a successful T-shirt

An overlocker remains the best tool for jersey, but it isn’t essential for a T-shirt pattern for children. On a standard sewing machine, a zigzag stitch set to 3.5 in width and 2.5 in length holds up well on most cotton jerseys. For hems, a 2.5 mm twin needle produces a neat finish in a single pass. A 75/11 or 90/14 stretch needle prevents skipped stitches on bamboo and Lycra jersey fabrics. If the machine skips stitches, the cause is almost always the needle, not the tension setting.

Which jersey to choose depending on the season and intended use

180–200 g/m² cotton jersey is the standard fabric: stable, easy to cut straight, and washable at 40°C. For children with sensitive skin or babies, bamboo jersey (usually 95% bamboo, 5% elastane) is softer and stays cool in warm weather. Interlock jersey, which is thicker and has a textured surface on both sides, is better suited to mid-season T-shirts worn without a base layer. Avoid jerseys that are too light – under 150 g/m² – for designs with ribbing: the difference in tension between the two fabrics causes the neckline to pull forwards after two washes.

• Stretch needle 75/11 for fine jersey, 90/14 for light sweatshirt fabric, changed for each project
• Check the seam allowances on the product sheet before printing
• A0 size if the pattern will be sewn more than twice in a year
• 180–200 g/m² jersey for sizes 2–6 years, interlock for the more active 8–14-year-olds
• Carry out a wash test on a fabric scrap before cutting out the final pieces

Complete the outfit: pair the T-shirt with matching trousers

A hand-sewn T-shirt fits naturally into a cohesive outfit when paired with matching bottoms. Discover our children’s trouser patterns: ankle-length joggers, pleated trousers or summer shorts, all available in the same size ranges as the T-shirts in the collection.

How do you adjust the waist size between two sizes on a children’s T-shirt pattern?

Most patterns offer nested sizes, from 2 to 14 years, marked on the same pattern sheet. Measure your child’s chest circumference and the distance from the neckline to the nape of the neck, then mark a point between two size lines if the measurements fall between two sizes. This is quicker and more reliable than altering the pieces separately after cutting.

Can you sew a children’s T-shirt pattern using non-stretch woven cotton?

No, unless the pattern explicitly states otherwise. Patterns for jersey incorporate reduced ease, which assumes that the fabric will stretch with the body. With woven cotton, the T-shirt will be too tight across the shoulders and difficult to pull over the head. If you want to work with a non-stretch fabric, opt for children’s blouse patterns, which are designed for stable fabrics.

How can you prevent the neckline from stretching out after the first few washes?

Stabilise the neckline before attaching the ribbing: a strip of flexible fusible interfacing or a stabilising thread basted 0.5 cm from the edge will maintain the curve’s length during ironing. Neckline seams that are sewn too tightly are the most common cause of distortion. On designs with bias binding, iron the folded bias binding dry before stitching it down: those 30 seconds of ironing prevent the ripples that appear after washing.