Start with clothes appropriate for the people who will see the photo. A clear neckline and plain fabric usually stay readable when the image becomes a small profile picture.
Check lapels, collars and buttons after generation. Fine stripes can distort; a logo-free solid top makes those errors easier to spot.
A situation you may recognize
A fine striped shirt looks good in the full photograph but noisy as an avatar.
Try a simpler shirt in a similar tone before changing the background. Inspect the neckline inside the final crop. The useful question is whether the clothing supports the face at delivery size, not how much detail the original contains.
Bring two outfits you actually wear for the intended role. Keep neckline, pattern and background contrast easy to compare.
02
Make the first version
Photograph each outfit in the same light, then view the upper-body crop at small size. Choose the neckline that frames the face without hiding the chin or competing with it. In results, inspect seams, buttons and jewelry before deciding that a more formal outfit is better.
03
Choose the next move
Use the organization’s dress expectations when they exist; otherwise choose the way you would meet the audience. Simple clothing need not mean identical clothing.
Try this before committing
Choose one plain layer and check the neckline in a tight crop. Very small checks or stripes can form distracting patterns when reduced. Keep a version without a jacket if your usual working context is informal.
Which clothing details cause problems in a small portrait?
Fine stripes can become distracting patterns; a bright collar can pull attention from the eyes. Compare clothing against the planned background and check the neckline at the final crop. Dress for the actual meeting or role, not an imagined level of formality.
Are patterns always a bad choice?
No. Judge the actual crop and output. Fine repeated stripes can become distracting or change during generation, while a familiar larger pattern may suit a personal brand. If a pattern is important, compare its structure with the source rather than only its color.