What to Do When You Are Between Shirt Sizes

When you are between shirt sizes, compare the smaller and larger options at the collar, shoulders, chest, waist, sleeves, and hem. Choose the size that accommodates the areas that are hardest to alter, then consider fit, fabric, layering, and tailoring.

Start with the Exact Product Chart

A general chart can identify a likely size range, but the exact product chart is more relevant. Brands use different chest ranges, shoulder widths, sleeve lengths, and definitions of slim, regular, relaxed, and oversized fits.

Confirm whether the chart lists body measurements or finished garment measurements before making a comparison.

Identify Which Measurement Creates the Conflict

Being between sizes usually means that one or more measurements fall near the boundary between chart rows. Your chest may suggest medium while your neck, shoulders, or sleeve length suggests large.

The best decision depends on which area would become uncomfortable or impractical in the smaller option.

When the Larger Shirt Size Is Usually Better

The larger size is usually the safer starting point when the smaller shirt restricts the chest, shoulders, collar, upper arms, or normal movement.

A shirt that lacks enough fabric cannot be enlarged easily. Extra fabric through the waist or sleeves can sometimes be reduced.

Signs the smaller size may be unsuitable

• Buttons pull or separate across the chest.
• The collar cannot close comfortably.
• Shoulder seams sit too far inward.
• Reaching forward creates strong tension.
• The sleeves grip the upper arms.
• The shirt rises sharply when the arms move.

When the Smaller Shirt Size May Be Better

The smaller size may be better when it provides enough room at the chest, collar, shoulders, and arms while the larger size creates excessive shoulder width, long sleeves, or a very loose body.

Do not choose the smaller size merely to create a slim appearance. A properly patterned slim-fit shirt is better than a regular shirt that is simply too small.

Signs the larger size may be excessive

• Shoulder seams fall far down the arms.
• The sleeves cover much of the hands.
• The collar leaves a large gap.
• The armholes hang too low.
• The torso creates large folds.
• The shirt balloons heavily when tucked.

Prioritize Shoulder Fit

Shoulder width is one of the hardest shirt dimensions to alter. The seam should sit near the natural shoulder edge unless the design intentionally uses dropped shoulders.

A shirt that is too narrow through the shoulders can restrict movement, while one that is too wide can distort the sleeve position and overall proportions.

Prioritize Chest Room

The chest should allow breathing, sitting, and reaching without button strain. Horizontal pulling lines and gaps indicate insufficient room.

When the larger shirt provides correct chest room but extra waist fabric, tailoring may be more practical than keeping the smaller shirt.

Prioritize Collar Comfort for Dress Shirts

A dress shirt worn with the top button closed must fit the neck comfortably. A collar that is too small cannot be corrected by choosing a looser tie or expecting the fabric to stretch.

Extra room through the shirt body can often be reduced more easily than a collar can be enlarged.

Consider Sleeve Length Separately

Sleeve length does not always require a larger body size. Many dress shirts offer several sleeve lengths within one neck or chest size.

Short, regular, and tall options can also correct proportions without changing the entire shirt size.

Slim Fit vs. Sizing Down

Slim fit changes the pattern through the chest, waist, sleeves, and armholes. Sizing down reduces several dimensions, including the collar, shoulders, sleeves, and body length.

Use the slim-fit chart rather than selecting a smaller regular-fit shirt.

Regular Fit vs. Sizing Up

Choosing a larger slim-fit shirt does not necessarily create the same proportions as a regular-fit shirt. The shoulder, sleeve, waist, and body shapes can remain different.

Compare both size and fit category.

How Fabric Changes the Decision

Non-stretch woven fabric

Woven cotton, linen, and similar fabrics need enough pattern room for movement. Strong pulling is unlikely to improve substantially.

Stretch woven fabric

Stretch can improve comfort, but it should not be used to justify restricted shoulders, button strain, or collar pressure.

Knit fabric

Knit shirts may adapt more easily to the body, although fabric recovery and thickness affect the final fit.

Layering Considerations

Shirts intended to be worn over a T-shirt or base layer need enough room for that layer. Test or measure with the intended clothing underneath.

Overshirts are often patterned with additional ease, so sizing up may not be necessary.

Expected Shrinkage

Natural fibers may shrink when washed or dried outside care instructions. Do not rely on shrinkage to correct a shirt that is clearly too large.

Follow brand-specific care and shrinkage guidance.

Tailoring Options

Tailoring can often reduce excess waist fabric, narrow sleeves, shorten sleeve length, or adjust body length.

Shoulder reconstruction, collar changes, and major armhole alterations are more difficult and expensive.

What to Check While Trying Both Sizes

1. Button the shirt fully when appropriate.
2. Check collar comfort.
3. Check shoulder-seam placement.
4. Take a natural breath.
5. Reach both arms forward.
6. Raise the arms overhead.
7. Sit and stand.
8. Check cuff and sleeve position.
9. Check whether the hem works tucked or untucked.

Buying Between Shirt Sizes Online

Compare your body measurements with the product chart and compare a well-fitting shirt with any available garment measurements.

Review repeated customer comments about narrow shoulders, small chest, long sleeves, generous fit, or shrinkage. Confirm the exchange policy before ordering.

Common Between-Size Mistakes

• Choosing the smaller shirt only for a slimmer look
• Ignoring shoulder restriction
• Ignoring collar use with a tie
• Choosing a larger body size only for sleeve length
• Depending on stretch to correct a tight shirt
• Assuming every brand uses the same size boundary
• Ignoring short, regular, and tall options
• Comparing body and garment measurements directly