Practical shirt-fit guide · Six steps

Shirt Buttons Gaping? Six Fit Checks Before Adding Another Button

If the shirt placket gaps, check room at the chest and waist before adding buttons. Proper Cloth's original video demonstrates measuring flat chest width only; it is not a diagnosis of every reason for gaping. Test movement and shoulder fit too.

5 min read2026-10-27

Proper Cloth official flat chest-width measurement video, not a full gaping diagnosis

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OriginalProper Cloth's official guidance on assessing shirt fitProper Cloth

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01

What you need

02

How to

1. Button the shirt normally and stand relaxed in front of a mirror. Note whether the placket gaps across the chest or lower down at the waist instead of pulling it shut.
2. Look for horizontal tension lines around the buttons. Proper Cloth identifies pulling buttons or tension near the underarms as signs to examine chest width.
3. Reach forward and sit down. If the shirt only gaps when moving, test whether there is enough ease for normal movement rather than adding buttons immediately.
4. Check the collar and shoulder seams too. Sizing up can add chest ease but leave the shoulders too wide or the sleeves too long, so try a different chest-to-waist cut.
5. Lay a well-fitting shirt flat and measure straight between the lower armpits, then across the narrowest part of the body. Compare garment measurements with the brand's size chart, taking care not to confuse flat widths and body circumferences.
6. Try different fits or sizes based on the problem area. Address underlying fit before relying on extra buttons or hidden pins; if only one area needs adjustment, ask a tailor what alterations are feasible.

One more tip

Button pulling can indicate insufficient room, but shoulder fit, posture and button placement can matter too. Going up one size might fix the chest while making the shoulders or sleeves too large.

Sources and media

OriginalHow to measure shirt chest and midsection widthsProper Cloth

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