Mrs. Miller is concerned with maintaining elegance, and Mrs. Peters' uneven sewing could be interpreted as something that 'doesn't fit'. Daisy Miller's attitude also does not fit societal expectations.
Step-by-step explanation:
The Winterbottoms from the passages provided do not seem to have a collective concern, but Daisy Winterbourne's mother, referred to as Mrs. Miller, is concerned with maintaining elegance as indicated by her dress and the enormous diamonds she wears. The sewing work of Mrs. Peters, which was uneasy and all over the place, may be what 'doesn't fit' in the traditional sense of neat and orderly sewing expected of women during the time. Daisy Miller herself is unconcerned with societal expectations, which could also be considered something that 'doesn't fit' within her social circle.