When you are between clothing sizes, compare all measurements relevant to the garment and consider fabric stretch, intended fit, layering, and alteration options. Sizing up is generally safer for structured, fitted, or non-stretch clothing and when one important body area requires more room. Sizing down may work for highly stretchable, loose, or intentionally oversized garments.
Compare your body measurements with general clothing ranges and identify the closest starting size.
The label alone cannot decide. Consider how the actual garment is built and which body area is hardest to fit.
Why Being Between Sizes Is Normal
Clothing size labels represent measurement ranges rather than exact body shapes. It is therefore common for a body measurement to fall near the boundary between two sizes.
You may also fit one size through the chest and another through the waist or hips. Standard clothing patterns use assumed proportions that do not match every individual.
Being between sizes does not mean that either option is automatically wrong. The better choice depends on the garment's construction, fabric, intended fit, and the body areas it must accommodate.
Start with the Product-Specific Size Chart
Compare your current measurements with the exact chart provided for the product. Do not decide only from your usual size or from a chart used by another brand.
Check whether the chart shows body measurements or finished garment measurements. Confirm the units and read every column relevant to the item.
When the chart gives body ranges, identify how close each measurement is to the boundary. Being 1 cm above a range is different from being near the top of the next size.
When It Is Usually Better to Size Up
The larger size is normally safer when a garment has limited stretch or a structured shape. Insufficient fabric cannot easily accommodate a body measurement that exceeds the intended range.
Reasons to choose the larger size
- Rigid woven fabric
- Structured tailoring
- Close-fitting garment design
- Buttons or zips under tension
- Room required for movement
- Clothing worn over layers
- One key measurement clearly needs more room
Garments often safer to size up
- Blazers and suit jackets
- Non-stretch trousers
- Fitted woven dresses
- Button-front shirts
- Coats and outerwear
- Workwear and uniforms
- Structured jumpsuits
When the Smaller Size May Work
The smaller size may be suitable when the material stretches comfortably, the garment is intentionally loose, or your measurements remain within both overlapping size ranges.
Product descriptions such as oversized, relaxed, boxy, or loose indicate that the normal size may already contain substantial ease.
Choosing the smaller option may also be reasonable when the larger size creates excessive shoulder width, sleeve length, rise, or garment length that would be difficult to correct.
Fabric may stretch around the body but still become uncomfortable, transparent, distorted, or unable to recover properly. Check the product's intended fit rather than relying only on stretch.
Let the Largest Relevant Measurement Guide You
Identify which body areas the garment must fit. A top that ends above the hips may not need to accommodate the full hip measurement, while a fitted dress must fit the bust, waist, and hips.
When one relevant area needs the larger size, choosing the larger option is often more practical. Extra fabric may be altered, but a garment that is too small may have little or no seam allowance available.
Prioritise areas that are difficult to alter, such as shoulders, armholes, chest, hips, rise, and garment structure.
Consider the Fabric Composition
Elastane, spandex, and stretch knitted structures can expand beyond their resting dimensions. Cotton, linen, wool, and synthetic fabrics may also stretch depending on their weave or knit.
A percentage of elastane in the fibre content does not describe the complete behaviour of the garment. Thickness, knit structure, lining, seams, and recovery also matter.
Rigid denim behaves differently from stretch denim. A woven blouse behaves differently from a knitted top even when their labelled size is the same.
Consider the Intended Fit
The product description may identify the garment as slim, fitted, regular, relaxed, oversized, compression, or tailored.
A slim-fit garment is designed to sit closer to the body, but it should not prevent normal movement. An oversized garment is deliberately cut larger, so sizing up may exaggerate the intended shape.
Product photographs can help, but check whether the model's measurements and worn size are provided. This information gives the images more practical context.
Think About Layering
Coats, jackets, cardigans, and outdoor clothing may be worn over other garments. Your normal body measurement does not describe the total space needed for those layers.
If you plan to wear a coat over thick knitwear, the larger size may provide better chest, shoulder, and armhole room. However, do not ignore sleeve length and overall proportions.
When possible, compare the garment measurements with an existing coat that fits comfortably over your usual layers.
Which Size Is Easier to Alter?
Choosing the size that fits the largest or hardest-to-alter area can make later tailoring more practical.
Waistbands, side seams, sleeve length, and hems can sometimes be adjusted. Major changes to shoulders, armholes, rise, chest structure, or garment balance may be more difficult and expensive.
Before relying on alteration, consider the garment's price, seam allowance, construction, lining, pattern, and access to a skilled tailor.
How Shrinkage May Affect the Decision
Natural fibres and certain garment constructions may shrink after washing or drying. Read the care instructions and product information before choosing the smaller option.
Cotton garments can shrink differently depending on whether the fabric was pre-shrunk and how the item is washed. Heat is often a significant factor.
Do not deliberately buy a larger size based only on assumed shrinkage unless the retailer warns that shrinkage is expected. The amount may be unpredictable.
How Customer Reviews Can Resolve a Close Decision
Look for repeated comments that the product runs small, runs large, has narrow shoulders, a tight waistband, short sleeves, or generous hip room.
Reviews are more useful when customers include measurements, usual size, chosen size, and fit preference. A statement such as “too large†has limited value without context.
Treat repeated patterns as supporting evidence rather than a replacement for the size chart.
Example: Between Medium and Large in a Dress
Suppose a shopper's bust and waist fall within medium while the hips fall just inside large. The dress is fitted and made from a non-stretch woven fabric.
Large is likely the safer starting size because the dress must fit through the hips and the fabric cannot expand significantly. The waist may be adjusted if necessary.
Example: Between Small and Medium in a Stretch Top
A shopper's chest measurement sits slightly above the small range, but the top is a relaxed knitted design with good stretch.
Small may still provide the intended result, particularly if the product reviews report generous sizing. Medium may be preferable when comfort and looser drape are more important.
Neither choice is universally correct because preferred fit is part of the decision.
Example: Choosing a Coat for Winter Layers
A shopper's body measurements match medium, but the coat will be worn over a shirt and thick jumper.
Large may provide better layering room. The shopper should compare the finished chest and shoulder measurements with an existing winter coat rather than using body size alone.
If large creates excessively long sleeves or a dropped shoulder, a different coat cut may fit better than simply changing size.
Common Mistakes When Between Sizes
- Automatically choosing the smaller size because of the label.
- Automatically choosing the larger size without considering an oversized product cut.
- Ignoring the body measurement that the garment must fit most closely.
- Assuming every fabric containing elastane will fit the same way.
- Forgetting about layers, shrinkage, or movement.
- Using a usual size from a different brand instead of the current chart.
- Choosing a size that fits the waist but not the shoulders, chest, or hips.
A Practical Between-Sizes Checklist
- Confirm the product-specific chart and measurement unit.
- Identify whether the chart uses body or garment measurements.
- Compare every body area relevant to the garment.
- Check whether the material stretches.
- Read the intended fit description.
- Consider layers, movement, and possible shrinkage.
- Identify which areas can realistically be altered.
- Review repeated customer feedback.
- Confirm the return or exchange policy.
Using the Clothing Size Calculator
Enter your chest or bust, waist, hips, height, and preferred fit in the Clothing Size Calculator .
The calculator identifies the general size associated with each measurement and shows when different body areas point to different size ranges.
Use the result as a starting point, then apply the garment factors explained above before making the final choice.
Conclusion
When you are between clothing sizes, neither sizing up nor sizing down is always correct.
Choose the larger size for rigid, structured, layered, or closely fitted garments when a relevant measurement needs more room. Consider the smaller size for stretchy, loose, or intentionally oversized garments when your measurements remain compatible with it.
Use the Clothing Size Calculator and the product-specific chart together to make a more informed decision.
Related Clothing Sizing Guides and Calculators
Main clothing sizing tool
Find Your Recommended Clothing Size
Enter your measurements in the Clothing Size Calculator, then use the related guides below to interpret size charts and compare fit.
Frequently Asked Questions
Should I size up or down when between sizes?
Size up for rigid, structured, fitted, or layered garments. The smaller size may work for stretchy, loose, or oversized garments.
Which body measurement should decide my size?
Use the largest measurement relevant to the garment, especially in an area that is difficult to alter.
Should I size down when a garment contains elastane?
Not automatically. Stretch, recovery, thickness, construction, and intended fit all matter.
Is it better to buy clothing slightly too large?
A slightly larger garment is often easier to alter, but excessive shoulder, rise, or length differences can still create poor fit.
Do customer reviews help when choosing between sizes?
Yes, particularly when repeated reviews describe the same fit issue and provide body measurements or worn sizes.