Sewing a Tunic With Side Slits and a Henley Placket

A relaxed tunic is one of the most useful garments to add to a handmade wardrobe. It can be worn over linen trousers in summer, layered with a long-sleeved tee during a cooler Melbourne morning, or paired with jeans for an easy weekend outfit. Side slits give the shape movement, while a Henley placket adds a practical opening and a small dose of tailored detail.

This project is suitable for confident beginners who are ready to work with a little more structure than a basic pull-on top. The silhouette is forgiving, but the front placket needs careful marking, accurate cutting, and patient pressing. Once the method becomes familiar, it can be adapted for dresses, nightwear, children’s tops, and lightweight jackets.

Fabric choice will determine how the finished tunic feels and behaves. A soft cotton lawn creates a cool, floaty garment, while linen, double gauze, rayon, or a stable cotton blend can produce different amounts of drape. Before cutting, consider the climate where you live, how often the garment will be washed, and whether you want a crisp handmade look or a softer, flowing finish.

Choosing the fabric and preparing the pattern

A medium-weight woven fabric is the easiest place to begin. Cotton poplin holds the placket neatly and makes side-seam stitching straightforward. Linen gives the tunic a beautiful texture, although it can shift slightly while cutting and will crease with wear. Rayon and viscose create an elegant drape, but they may stretch along the bias and require more control at the neckline.

For warm Australian conditions, breathable fibres are especially comfortable. A linen-cotton blend works well for humid Brisbane or a hot Adelaide afternoon, while cotton lawn is pleasant in Sydney and easy to wash. If you live in Hobart or near the Victorian high country, a heavier fabric or a longer sleeve can make the same pattern useful across more of the year.

Prewash the fabric in the way you expect to launder the finished garment. Cotton and linen can shrink, and skipping this step may turn a generous tunic into a shorter top after its first wash. Dry it according to your usual routine rather than treating it unusually gently. If you normally line-dry clothing outdoors, allow for that process when testing shrinkage and pressing.

The pattern should include a front, back, sleeve if required, and a placket opening. Check the finished measurements rather than selecting a size from body measurements alone. A tunic generally needs ease through the bust and hip, but too much width can make the side slits flare awkwardly. Trace the size that best suits your measurements and blend between sizes where necessary.

Adjusting the length and side slits

Try the paper pattern over a top you already enjoy wearing. Decide whether the hem should finish at the high hip, mid-thigh, or just above the knee. The position of the side slit affects comfort and proportion: a shorter tunic may need only a small opening, while a longer version benefits from a slit that begins around the upper thigh or wherever you can sit and walk comfortably.

Mark the slit length directly on both side seams. Keep the markings identical so the hem remains balanced. If you want a more dramatic split, extend it gradually rather than cutting a very high opening immediately. A 20–30 centimetre slit is often enough to add movement without exposing too much of the side seam.

Add seam allowance only where the pattern requires it. The slit itself usually needs a neat turned finish, so check whether the instructions allow enough width for folding. A narrow hem can work on lightweight fabric, while a wider double-fold hem is more forgiving on linen or cotton poplin.

Stay-stitch the upper edge of the slit area if the fabric is prone to stretching. Sew the side seams from the underarm down to the slit mark, then press the seam allowances open or towards the back according to the pattern instructions. Finish each slit edge before sewing the hem, and keep the two sides symmetrical.

Building a clean Henley placket

A Henley placket is a short opening at the centre front, usually finished with a separate strip or facing and secured with buttons. It creates visual interest without the complexity of a full shirt front. The most important preparation is transferring every centre-front line, fold line, and stopping point accurately from the pattern to the fabric.

Interface the placket piece if the fabric is soft or loosely woven. Lightweight fusible interfacing adds stability without making the front stiff. Test the interfacing on a scrap first, particularly with rayon, linen blends, or fabrics that may show a change in surface texture after pressing.

Sew slowly around the base of the opening. This area carries stress when the garment is pulled over the head, so the stitching should be smooth and secure. A short reinforced rectangle or carefully sewn triangular finish can prevent the opening from tearing. Avoid cutting beyond the marked point; an extra snip is difficult to repair and may become visible when the placket is folded.

Pressing shapes the placket as much as stitching does. Use a pressing cloth if the fabric marks easily, and press each fold before moving to the next step. A tailor’s ham or a rolled towel can help support the neckline while you work. Finish the visible edge with neat topstitching, keeping the distance consistent on both sides.

Choose buttons that suit the weight of the fabric. Small shell or corozo buttons are attractive on linen, while flat plastic buttons are practical for frequent washing. Australian haberdashery shops and fabric departments often carry a wide range, but checking local independent stores can uncover unusual vintage-style options. Sew a spare button inside the garment or keep one with your sewing supplies.

Sewing the neckline, seams and hem

Once the placket is complete, join the shoulder seams and finish the neckline according to the pattern. A narrow facing creates a clean interior, while bias binding is useful for a softer, less bulky edge. If the neckline facing wants to roll outward, understitch it and secure it at the shoulder seams with a few discreet hand stitches.

The shoulder and side seams need a finish that suits the fabric and your sewing machine. An overlocker is quick and professional, but a zigzag stitch, pinked seam, or enclosed French seam can work well. French seams are particularly attractive in lightweight cottons and lawns, although they may be too bulky around a structured placket.

Before hemming, try the tunic on with the shoes and layers you expect to wear. A hem that looks right barefoot may feel too short with leggings or too long over wide-leg trousers. Stand naturally, walk, sit, and lift your arms. Make small adjustments before finishing the lower edge.

Press the hem upwards, then stitch it with a straight stitch or a subtle blind hem. At the top of each side slit, reinforce the seam with a short line of stitching. Bar tacks are useful if the opening will receive frequent strain. Trim loose threads, give the whole garment a final press, and check that the placket lies flat when the tunic is hanging.

Personalising colour, texture and details

A simple tunic is a good base for experimenting with colour. You can use contrast fabric for the placket, add a narrow sleeve cuff, or stitch a small patch pocket near the hip. Keep the extra details balanced with the relaxed shape. Too many competing features can make the garment feel busy, especially when the fabric already has a strong print.

For a handmade colour project, consider exploring natural fabric dyeing before cutting the garment. Onion skins, avocado stones, eucalyptus leaves, and other plant materials can produce subtle shades, although results vary with fibre content, water chemistry, mordants, and preparation. Dyeing fabric before sewing allows the colour to reach the seam allowances evenly.

Always test a swatch first and record the recipe, fabric type, dye quantity, and time. Natural dyes can shift from pale gold to tan, blush, green-grey, or warm brown depending on the process. Plant dyes also need appropriate handling and disposal, so follow reliable instructions and protect your work surface.

Australian makers have access to distinctive local inspiration, from eucalyptus greens and iron-rich ochres to coastal blues and sandy neutrals. You do not need to collect plants from public land or native bush areas; kitchen scraps, commercially sourced dyestuffs, and fallen material from your own garden are safer and more responsible choices. Colour can then become part of the garment’s story without overwhelming the pattern.

Small embellishments can also make the tunic personal. Add hand embroidery around the placket, use contrasting topstitching, or make fabric-covered buttons from leftover scraps. If you share your finished garment online, process photos can be as interesting as the final outfit. Victoria’s creative sewing story offers a useful reminder that handmade clothing develops through experiments, adjustments, and repeated practice.

Wearing, washing and evaluating the finished tunic

The side slits make this style particularly flexible. Wear it loose over tapered trousers, tuck just the front edge into a skirt, or let the hem move over shorts in summer. A longer version can work as a beach cover-up when sewn in cotton gauze, while a darker linen tunic may suit workwear with a camisole underneath.

Think about local laundering habits when choosing finishes. Many Australian households line-dry clothing to save energy and make use of strong sunlight, but intense sun can fade some dyes and prints. Turn coloured garments inside out, avoid leaving them outdoors for longer than necessary, and follow the fabric’s care needs rather than assuming every cotton or linen piece can tolerate hot washing.

Fibre content and care information matter when buying fabric or selling a handmade garment. Keep notes about the fabric composition, washing method, and any dyeing process. If you sell the tunic at a market in Australia, clear fibre and care information helps customers look after it properly, while truthful descriptions support responsibilities under the Australian Consumer Law. Check current official guidance if you sell regularly, particularly when making claims about natural fibres, dyes, or ethical production.

Use the finished garment as a fitting record. Notice whether the shoulder sits correctly, whether the placket opens comfortably, and whether the side slits stay flat while walking. Write down any changes you would make to the next version, such as lowering the neckline, adding width at the hip, shortening the sleeves, or changing the button size.

Fabric choice	Finished effect	Placket support	Best use
Cotton lawn	Light, smooth and softly structured	Light interfacing recommended	Hot weather and layering
Linen-cotton blend	Breathable with moderate body	Medium-weight interfacing	Everyday wear across seasons
Cotton poplin	Crisp and easy to sew	Stable placket with minimal support	A polished first version
Rayon or viscose	Fluid drape and movement	Careful stabilising essential	Dressier tunics
Double gauze	Soft, relaxed and textured	Lightweight interfacing only	Casual summer clothing

A well-made tunic with side slits and a Henley placket rewards careful preparation more than complicated technique. Choose fabric that suits your climate, stabilise the front opening, reinforce the slit ends, and press at every stage. With those foundations in place, the pattern becomes a reliable canvas for colour, texture, embroidery, and personal style.

Gather your fabric, make a test placket from scraps, and document each adjustment as you sew. Share the finished garment through your creative community or keep it as a practical record of your progress, then return to the pattern when you are ready to make a second version with a new fabric and a fresh interpretation.