How to Sew a Lined Plush Bag Around a Rigid Internal Support

Think of the construction as three nested shapes: the plush shell fits around the support, the support establishes the rectangular form, and the lining fits inside it. Their dimensions differ because the support has thickness and the fabric seams occupy space.

Bag designer LiEr distinguishes outer fabric, stabilizers, inserts and lining as separate construction layers. Her bag-making guide also explains why turning a completed bag through the lining becomes impractical with bulky fabrics and inserts, and shows an alternative that joins separately assembled bags at their folded rims. This tutorial adapts that approach with a hand-sewn finish above the support. Make A Bag Chapter 4: Design—Layers, Closures and Finishing

Use this method with a straight-sided support that can enter through the full opening. A support wider at the bottom than the opening needs a different insertion plan; check that geometry before drafting.

Gather the following:

• Short-pile plush or minky for the exterior.
• Lightweight woven cotton for the lining.
• Cotton twill for a sew-in backing beneath the plush.
• An assembled, open-top rectangular support with a base, smooth edges and gently rounded corners.
• Two lengths of 1-inch-wide webbing for handles; 16 inches each is an illustrative starting length for short handles.
• Polyester thread, a hand-sewing needle, fabric scissors, ruler, marking tool, pins or clips, and a sewing machine.

The construction starts with an already assembled support. Measure it in its final condition, including any edge covering. Choose a form whose corners and rim can be covered neatly without pronounced ridges showing through the plush.

A bottom stiffener and a complete box support produce different results. A base insert supports the floor; the construction here also supports the sidewalls. LiEr describes template plastic, plastic canvas and heavier flexible cutting boards as different base-insert options, identifying plastic canvas as moderately flexible. Do not assume that every insert material will create rigid walls. Make A Bag Chapter 4: Design—Layers, Closures and Finishing

For this project, use twill as a sew-in backing and attach the handles through both twill and plush. The backing also gives you a woven layer to catch when finishing the rim; LiEr documents canvas and twill as sew-in bag stabilizers in the same guide.

Measure the support’s outside width, depth and height for the shell. Separately measure its inside width, depth and usable height for the lining. Record whether each measurement describes a finished seam line or a cut edge.

Use five panels for each fabric bag: front, back, two ends and a base. Draft the finished panel shapes first, then add allowances. For the example below, use ½-inch construction seams, a 1-inch turn-in at the shell’s top and a ½-inch turn-in at the lining’s top.

Draft the exterior around the support

Suppose the support measures 8 inches wide, 3 inches deep and 6 inches high outside. As an initial mock-up, try an exterior with finished seam-line dimensions of 8¼ × 3¼ inches at the base and a finished rim 6¼ inches above the base seam. The added room is a fitting allowance to test, not a universal plush-fabric rule.

Exterior piece	Quantity in plush and twill	Illustrative cut size
Front and back	Two of each	9¼ inches wide × 7¾ inches high
Ends	Two of each	4¼ inches wide × 7¾ inches high
Base	One of each	9¼ × 4¼ inches

The front height calculation is 6¼ inches finished height + ½ inch bottom seam allowance + 1 inch top turn-in = 7¾ inches. The top turn-in replaces a conventional top seam allowance; do not add another ½ inch there.

Draft the lining from the actual cavity

Measure the inside after fitting the shell and support together. Choose a lining attachment line approximately ⅛ inch below the shell’s finished rim. Measure the vertical distance from the support’s inside floor to that line.

For illustration, if your chosen lining seam-line dimensions are 7⅞ inches wide, 2⅞ inches deep and 6 inches high, cut front and back panels 8⅞ × 7 inches, end panels 3⅞ × 7 inches, and a base 8⅞ × 3⅞ inches. These sizes include ½-inch seams and a ½-inch top turn-in.

Baste the lining and test it before final stitching. Its floor should rest on the support’s floor while the folded top reaches the attachment line without being pulled upward. Linda Matthews’s drop-in lining tutorial likewise places the fitting check before attachment, when adjustments remain accessible. How to Add a Drop-in Lining to a Simple Tote Bag

Mark an upward arrow on every upright paper panel and keep the plush nap running in the same direction on the front, back and ends. Cut without stretching the fabric, and transfer the seam lines and base-corner intersections to the backing.

Test the machine on scraps of plush backed with twill. Shannon Fabrics recommends a walking foot, a 90/14 stretch needle, longer stitches, reduced presser-foot pressure and double pinning for its Cuddle minky. Use these as starting points for that fabric, then check the sample for even feeding and complete stitches. Cuddle Minky 101

Baste each plush panel to its matching twill panel within the seam allowances, keeping both layers flat. Treat each pair as one exterior piece from this point onward.

For longer pile, tuck the fibers inward between the right sides before sewing. Designer Ajaire Parello demonstrates this technique to reduce trapped pile and describes gently releasing remaining fibers afterward with a stiletto. Work along the finished seam without disturbing its stitches. Tips for Sewing a Lined Coat with Minky Fabric

First join the front, one end, the back and the remaining end into a rectangular loop, with right sides together. Sew the four vertical seams from the top raw edges down to the marked base seam line. Secure the seam ends there, leaving the bottom ½-inch allowances free.

Fit the base into the loop, right sides together. Match the four marked seam-line corners. Sew each base edge separately, starting and stopping exactly at those intersections. Move the adjacent allowances aside at each corner so they do not become caught in the next seam. Turn the shell right side out and inspect the corners.

Slide the support into the shell for a fitting check. It should reach the bottom without forcing the vertical seams outward. Remove it again before attaching the handles.

Mark the finished rim line 1 inch below the top raw edge. On each broad panel, position the two ends of one webbing handle symmetrically, with their lower ends 2 inches below that line. Fold each webbing end under ½ inch. Check that both handles have equal exposed lengths and that neither is twisted.

Stitch each end through the plush and twill with a small rectangle and crossed diagonals, keeping the stitching below the future rim fold. Flatten the pile beneath the attachment while positioning it. This is a construction detail for the small costume bag; it establishes no carrying-capacity rating.

Insert the support again. Arrange the shell’s seam allowances between the fabric and support so they do not gather into lumps at the base corners.

Turn the shell’s 1-inch top allowance inward over the support’s rim. The finished fabric fold should sit slightly above the rigid edge. At each corner, form a small tuck in the turned-in allowance so it lies flat inside. Hand-baste the fold to hold it while fitting the lining.

Assemble the lining with the same five-panel sequence used for the shell. Keep its right side facing inward toward the bag’s contents, with its seam allowances facing outward toward the support. Fold its top edge ½ inch to the wrong side.

Lower the lining into the support. Seat the base corners first, then match the upright corners. Clip the folded top approximately ⅛ inch below the shell’s rim. Matthews’s tutorial uses the same essential sequence of folding the lining edge, inserting it, checking the fit and aligning it before sewing. How to Add a Drop-in Lining to a Simple Tote Bag

The shell and lining follow different paths around the support’s thickness, so do not force their raw edges or seam allowances to match. Judge the finished folds: the shell should cover the rigid rim, and the lining should meet its attachment line smoothly. Distribute small adjustments at the corners before stitching.

Hand-sew with small slip stitches. Take a short stitch inside the lining fold, then catch a few threads of the twill-backed shell turn-in behind it. Alternate around the opening, keeping the thread relaxed enough that the rim retains its shape. Stitch through fabric only; the rigid support remains enclosed between the layers.

What you see	What to check	Adjustment
Shell seams spread when the support enters	Exterior mock-up is too tight	Increase the relevant panel’s finished width or depth
One plush panel extends past its matching edge	Layers shifted during feeding	Re-baste to the marked seam lines before resewing
Lining floor hangs above the base	Lining is too short or top is clipped too high	Lower the attachment position if coverage permits, or add lining height
Lining gathers across the floor	Excess height or base dimensions	Pin out the excess, remove the lining and revise its seams
Top edge puckers after hand sewing	Thread tension or uneven distribution	Release that section and reattach without pulling
A ridge appears at one corner	Folded allowances have accumulated	Reposition the allowances and remake the corner tuck

Inspect the entire rim before securing the final thread: the lining should rest on the floor, the support should remain covered, and the handles should rise evenly. Gently free any trapped pile to finish the exterior seams. For this hand-closed construction, reopening the rim seam provides access if you later need to remove the support or revise the lining.

• Shannon Fabrics, Cuddle Minky 101.
• Ajaire Parello for Shannon Fabrics, Tips for Sewing a Lined Coat with Minky Fabric (Mackinaw Coat Pattern).
• LiEr, ikat bag, Make A Bag Chapter 4: Design—Layers, Closures and Finishing.
• Linda Matthews, How to Add a Drop-in Lining to a Simple Tote Bag.