Hello and welcome from Wisconsin. Have you tried Raverly.com. They have thousands of patterns. Just do a search for sleeveless jacket. Many of their patterns are free
HI vanda and welcome to KP. karwal is correct about Ravelry They have many patterns for sleeveless vests and sleeveless cardigans. And if you can't find it there. google sleeveless knit carigan pattern. You will surely get results.
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