Coptic Stitch Tutorial: Sew a Sketchbook That Opens Completely Flat

The coptic stitch sews sections directly onto two separate hard covers and links each section to the last with a row of chain stitches across the spine. Nothing is glued to the spine, so the book opens completely flat at every page. That is why it is the classic sketchbook binding, and why it looks so good with coloured thread.

It is also the binding where most first attempts go loose or crooked, almost always for one of four reasons: holes that do not line up, cover holes too far from the edge, stitches not tightened at every station, and the needle passing under the chain from different sides. This tutorial is built around avoiding all four. If you have never sewn a section before, make a pamphlet-stitched notebook first: the bookbinding for beginners guide explains why and shows where coptic sits among the other bindings.

What you need

• 8 sections of 3 folios each, of 120–150 gsm drawing paper, 5½ × 8½ in or A5, with the grain running along the fold
• Two boards of 2 mm greyboard, each the size of a page, grain running from head to tail, covered on both sides
• Waxed linen thread, 4-ply, about 2.5 m (8 ft) in total, and a needle (a curved needle helps but is not essential)
• An awl, a scrap of board to pierce onto, and a bone folder
• A four-station piercing guide and a board-hole gauge (the free template pack has both; see the end of this guide)

Grain first. Letter and A4 copy paper is usually long grain, so a whole sheet folded in half puts the grain across the spine and the pages will fight the binding. Use short-grain paper, or cut half-size sheets from Tabloid or A3. The beginner’s guide shows four quick grain tests.

Covering the boards. Cover each board on both sides so it cannot curl: cut the covering 15–20 mm larger than the board all round, glue it on, cut the corners at 45° leaving about one and a half board thicknesses (3 mm for 2 mm board), turn in the long edges, tuck the corners, then turn in the short edges. Line the inside and dry the boards under weights overnight before you pierce them.

Thread: how much and how to manage it

For a multi-section book, cut the section height times the number of sections, plus one more height, then add about 30 cm (12 in) for the cover attachments. Eight A5 sections come to roughly 2.2–2.5 m. That is too long to pull through comfortably, so sew it in two or three lengths of up to 1.5 m and join each new length with a weaver’s knot inside a section, where the knot hides in the fold.

Lock the thread on the needle before you start: pierce the short end with the needle point about 5 cm from its end and pull the long end, so the short end slides down over the eye and cannot fall out.

Sewing the coptic stitch

Step 1: Pierce the sections and boards

Make a piercing guide: a strip of paper as tall as the sections, folded along its length, with four stations marked on the fold. Keep the end stations about 15 mm from the head and tail, and measure every station from the head, not from the previous mark. Write HEAD at the top.

Open each section over a cradle, lay the guide inside the fold, head edges flush, and push the awl straight down through each mark. Pencil the section number on its first page.

Then lay the board-hole gauge on the inside of each covered board, against its spine edge, and pierce four holes 8 mm (5/16 in) in from the edge, at the same heights as the stations, onto a scrap of board.

Step 2: Attach section 1 to the front cover

Lay the front cover face down with section 1 on top, holes aligned. Start inside section 1 at the head station, leaving a 10 cm (4 in) tail. Come out, take the thread round the spine edge of the cover and in through the cover hole from the outside, so it comes up between cover and section. Pass the needle under the thread you have just made, from the head side, and go back into the same station. Tie the tail to the working thread inside.

Step 3: Work along section 1

Inside the section, go to the next station and come out. Attach to the cover in exactly the same way: round the edge, in through the cover hole, up between cover and section, under the stitch, and back in. Repeat at every station. At the last station, after attaching to the cover, go straight up into section 2 at the same station instead of back into section 1.

Step 4: Add section 2 with a chain

Inside section 2, go to the next station and come out. Slide the needle under the stitch that joins section 1 to the cover at this station, from the outside, and pull up so the thread hugs it. Go back into section 2 at the same station. Repeat at every station. At the last one, after the chain stitch, go into section 3.

Step 5: Build the spine

For every new section, at every station: come out, slide the needle under the chain stitch between the two sections below, pull up, and go back in. Tighten each stitch by pulling along the spine towards the next station, not outwards, and always pass under the chain from the outside of the spine so every link leans the same way.

Step 6: Attach the back cover and tie off

Sew the last section with chain stitches as before, but at each station, before going back in, attach to the back cover first (round its edge and in through its hole from the outside), then slide under the chain between the two sections below, then go back into the station. At the final station, tie off inside with two half hitches round the inside stitch and trim.

What good looks like

Four straight chains run across the spine, one at each station, with every link the same size. The book lies flat when open at any page, the covers sit level with the sections, and nothing moves when you flex the spine.

Troubleshooting

Problem	Likely cause	Fix next time
The chains sag between sections	Stitches not pulled tight before moving on	Tighten after every station, pulling along the spine
The cover hangs loose	Cover holes too far from its edge	Keep the holes 6–10 mm from the spine edge
Sections pull apart at head and tail	End stations too close to the edge	Keep end stations 15 mm from head and tail
The chains lean in alternate directions	Needle passed under the stitch from different sides	Always pass under from the outside of the spine
Holes do not line up from section to section	No guide, or the guide shifted	Pierce every section through one guide, head edges flush
Thread tangles and frays	Working length too long	Sew in lengths of 1.5 m at most, joined inside a section

Coptic stitch vs kettle stitch vs long stitch

These three get confused because all of them join several sections with one thread.

	Coptic stitch	Kettle stitch	Long stitch
What it is	A whole binding: a chain at every station	A linking knot at the head and tail stations only	A whole binding sewn through a soft cover
Covers	Two separate boards, sewn on	Whatever the binding uses, often hidden	One wrap-around soft cover
Spine	Exposed chains	Hidden or exposed, depending on the binding	Long stitches show on the cover spine
How it opens	Completely flat	Depends on the binding	Flat
Glue	None	Often a spine lining	None

Which should you sew? For a sketchbook or anything you will draw across both pages, coptic. For a soft travel journal with no boards, long stitch. The kettle stitch is not a choice so much as a skill you will use inside most multi-section bindings, including hardcovers.

Get the piercing guide

The free Bookbinding Template Pack on the reader bonuses page includes the four-station coptic guide and the board-hole gauge at actual size, in US Letter and A4. Print at 100% and check the scale bar. The full twenty-project skills ladder, from a pocket notebook to a cloth hardcover, is in The Complete Bookbinding Handbook, Book 2 of the Quillfold Studio Handbooks, which is coming soon and not yet published.