The dress I am currently making has a bodice with a small grown on cap sleeve. To give the bodice a bit more body and to help with hiding the seams and avoid hemming the cap sleeve I have fully lined it completely bagging it out.
To start with sew the shoulder seams of both the outer and the lining. One good tip is to trim away a small amount, say 2mm, from the neck edge and the armhole edges of the lining. The lining will then be slightly smaller than the outer. This helps prevent the lining rolling to the right side.
Lay the outer and the lining on top of each other, right sides together. Sew the neck seam from centre back to centre back matching the shoulder seams and the centre front points.
Before I sew the armhole seams it’s best to understitch the lining of the neck seam. Trim the seam allowance and clip carefully into the curves. On the right side stitch the lining to the seam allowance close to the edge folding both the seam allowances towards the lining.
Next sew the armholes. Once you have sewn both the armholes pull the back bodice sections through the shoulders so the bodice is now the right way out and press the armhole seams.
The final step is sewing the side seams. Open up the bodice and pin the underarm points so they match together. Sew the seam from the waist of the lining past the armhole point to the waist of the main fabric.
Give the bodice a good press and you’re done!
The bodice is now ready to add the skirt of the dress.
I’m putting an invisible zipper into the back of this dress so I have left the centre back seams open. But if you were having a different type of fastening you can sew the centre back seams before you turn the bodice the right way through.