This pattern by Deer and Doe is a subtly fitted blouse with Chelsea collar and shoulder yoke. You have two options for construction, version A with 3/4 sleeves and version B with short sleeves.
This pattern has a size range of 34 to 46.
This intermediate pattern recommends using lawn, chiffon, rayon or silk. When viewing fabric requirements consider that extra fabric should be allowed to match stripes of plaids in the case of directional fabric. In addition to the fabric you will need 25" of lightweight fusible interfacing.