Make template

Fold diaper in half. Lay template in place. Cut. 

Cut off back seam 

Trace wing and leg curve onto cut-away pieces 

Cut along tracings.  This shapes the pad and creates the wing tab. 

Round the tab edges 

Here are all the diaper pieces 

Sandwich the back wings between the tab pieces,
 dividing the fabric layers evenly (usually by twos). 
 Stitch across the straight edge. 

See how the seam allowance is encased within
 the diaper?  No raw edges.

Gently separate the layers of the back edge,
 pulling the pad stitching out for about ¾”. This is
where the back waist elastic will go

The leg elastic goes here 

The back elastic should start and end about even
with the straight sides. 

The leg elastic should start about 1” beyond the
 straight sides in the back and end about 2-3” from
 the front edge.  Place the elastic between the
 diaper layers and back tack one end down. 
 Continue stitching “blind”, stretching the elastic as
 you go. Back tack the other end to secure. 

The elastic is in. 

Serge the edges starting from one front  corner
 and ending at the other one. 

Put fasteners on as you wish