I have found many answers that have pointed me on the right track for what I want, like this.
However, if I had a string like \"this attachment will be 22 in. x 15 i
Assuming there really is a number in the string, you can use patindex():
patindex()
select left(s, patindex('%[^0-9]%', s) - 1) from (select substring(col, patindex('%[0-9]%', col), len(col)) as s from t ) t;