stuck out like a sore thumb

Glaringly didn't belong

To stick out like a sore thumb is to be glaringly obvious or conspicuous, usually in an unwanted way.

The image is of an injured thumb—swollen, bandaged—impossible to ignore among healthy fingers.

In my suit at the beach party, I stuck out like a sore thumb.

The phrase emphasizes uncomfortable visibility rather than mere difference.

Related

square peg in a round hole · like a bull in a china shop · prominent · outsider · embarrassed · self-conscious · black sheep · eyesore · standout · distinct · swollen · anomaly · inflamed · outlier · glaring · hard to miss · uncomfortable · obvious

Opposites
visibility/conspicuousness

stuck out like a sore thumbblended in

Became indistinguishable from surroundings

flew under the radar · invisible · inconspicuous · slipped under the radar · kept a low profile

social fitting/belonging

stuck out like a sore thumbfit right in

belonged · fit like a glove · assimilated · conformed · looked the part

Family

sticks, sticking, sticker, stickers, stickiness, outermost, outward, likeness, unlikely

Familiarity
Top 50,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G