The difference between round and flat laces lies in cross-sectional geometry, alignment with internal eyelet dimensions, and the resulting length required for tying.
While round laces maintain a neutral aesthetic and are ideally suited for delicate blind eyelets (2 mm) or prominent punched eyelets (3 mm), flat laces (3 mm to 6 mm) sit flush against the tongue, distribute tensile pressure evenly across the instep, and require slightly more total length for knots and eyelet routing with thicker profiles.
| Shape & Dimensions | Model Series | Fit & Pressure Distribution | Eyelet Alignment | Recommended Footwear Type |
|---|---|---|---|---|
| 2.0 mm Round Classic / Splendore | R2-CS / R2-SL | Compact cord volume, minimal knot length requirement. | Concealed blind eyelets (2.0 to 3.0 mm) | Oxfords, dress derbies, elegant suit shoes. |
| 3.0 mm Round Classic Sportive | R3-CS | Substantial with excellent grip, dimensionally stable in speed hooks. | Eyelets & hooks from 3.5 mm | Budapesters, chukka boots, outdoor footwear. |
| 3.0 mm Flat Classic Sportive | F3-CS | Ultra-flat tongue contact, eliminates localized pressure points. | Fine eyelets & blind eyelets from 2.5 mm | Goodyear-welted classics, brogues, fine low shoes. |
| 4.0 mm Flat Classic Sportive | F4-CS | Uniform pressure distribution, smooth edge alignment. | Punched eyelets from 3.5 mm | Derbies, Budapesters, designer sneakers. |
| 6.0 mm Flat Classic / Xtra Robust | F6-CS / F6-XR | Broad instep pressure relief, requires more lace length for tying. | Wide eyelet slots & D-rings | Retro sneakers, heritage boots, workwear boots. |
A timeless look is achieved by avoiding short-lived fashion trends and choosing a shoelace precisely tailored to the shoe type and its eyelet architecture.
The shoe itself determines the look: formal smooth leather classics with blind eyelets call for timelessly delicate 2 mm round laces (R2) or slender 3 mm flat laces (F3), while distinctive Budapesters, chukkas, and heritage boots only unfold their lasting character with robust 3 mm round laces (R3), 4 mm flat laces (F4), or substantial 6 mm profiles (F6/XR).
| Classic Look | Recommended Series | Style Impact | Eyelet Type | Matching Footwear Types |
|---|---|---|---|---|
| Formal-Traditional | R2-CS / R2-SL (2 mm) | Maximally discreet, unobtrusive, elegant understatement. | Blind eyelets (2.0–3.0 mm) | Oxfords, gala shoes, fine derbies. |
| Subtle Connoisseur Look | F3-CS (3 mm) | Refined flat profile, subtly breaks with round lace conventions. | Blind eyelets & fine eyelets | Goodyear-welted classics, brogues. |
| Classic-Substantial | F4-CS (4 mm) | Balanced contours with harmonious silk sheen finish. | Punched eyelets from 3.5 mm | Open derbies, Budapesters, casual classics. |
| Rustic & Heritage | R3-CS (3 mm)F6-XR (6 mm) | Solid, authentic, ideally matched to heavy leathers and vintage patina. | Metal eyelets & speed hooks | Workwear boots, hunting boots, chukka boots. |
Measuring the original lace directly tip-to-tip while unlaced remains the most reliable method for determining length.
Because shaft width, instep volume, and lacing techniques vary, a purely mathematical formula is prone to error; standard LACCICO length increments provide practical guidance based on eyelet pairs.
| Eyelet Pairs | Recommended Length | Typical Footwear Types & Lacing Methods | Available Model Series |
|---|---|---|---|
| 1–2 Eyelet Pairs | 45 cm | Chukka boots, minimalist low shoes with 2 eyelets. | R2-CS, R2-SL, R3-CS |
| 3–4 Eyelet Pairs | 60 cm | Classic derbies, bluchers, summer low shoes. | R2-CS, R2-SL, R3-CS, F3-CS, F4-CS |
| 4–5 Eyelet Pairs | 75 cm | Classic oxfords, business dress shoes, Goodyear-welted Budapesters. | All series (R2, R3, F3, F4, F6, F6-XR) |
| 5–6 Eyelet Pairs | 90 cm | Oxfords with wider shaft opening, low-top sneakers, casual low shoes. | All series (R2, R3, F3, F4, F6, F6-XR) |
| 7–8 Eyelet Pairs | 120 cm | Mid-cut boots, high-top sneakers, shoes with closely spaced eyelets. | All series (R2, R3, F3, F4, F6, F6-XR) |
| 9+ Eyelet Pairs | 150 – 180 cm | Tall boots, heritage boots, workwear boots with speed hooks. | R2 (up to 180 cm), R3, F6, F6-XR (up to 150 cm) |
A precise fit in the eyelet is guaranteed when the lace diameter or width is matched exactly to the internal clearance of the shoe eyelets.
For small, concealed blind eyelets (2.0 to 3.0 mm), only delicate 2 mm round laces (R2) or slender 3 mm flat laces (F3) are suitable; substantial 3 mm round laces (R3) and 4 mm flat laces (F4) require visible punched eyelets from 3.5 mm upward to prevent edge abrasion and sluggish gliding.
| Internal Eyelet Clearance | Matching Model Series | Glide & Routing | Available Lengths | Typical Shoe Construction |
|---|---|---|---|---|
| 2.0 – 3.0 mm Blind eyelets | R2-CS / R2-SL (2 mm)F3-CS (3 mm) | Glides with minimal friction without bunching or edge wear. | R2: 45–180 cm F3: 60, 75, 90, 120 cm | Goodyear-welted business shoes, oxfords, fine derbies. |
| From 3.5 mm Punched / metal eyelets | R3-CS (3 mm)F4-CS (4 mm) | Snug fit, fills the eyelet hole without play. | R3: 45–150 cm F4: 60, 75, 90, 120 cm | Budapesters, chukka boots, designer sneakers. |
| From 4.5 mm / slots Wide eyelets & hooks | F6-CS (6 mm)F6-XR (6 mm) | Flush routing without pinching or creasing outer edges. | 75, 90, 120, 150 cm | Sneakers, heritage boots, heavy work boots. |
Shoelaces made from pure cotton offer superior knot security compared to synthetic fibers, protect the shoe's upper leather, and absorb finishing waxes permanently down to the fiber core.
Unlike slick polyester or nylon, the dense cotton braid does not chafe against the upper leather and avoids an artificial sheen.
| Property | LACCICO Cotton (Waxed) | Standard Synthetic (Polyester/Nylon) |
|---|---|---|
| Knot Hold & Friction | High inherent friction & wax adhesion; knot remains reliably secure. | Slick synthetic surface; tends to come undone on its own. |
| Leather Protection | Soft fiber structure; no cutting or chafing against the upper leather. | Hard edge fibers can scratch delicate upper leather. |
| Wax Absorption | Complete fiber penetration; wax is bound directly within the yarn. | Does not absorb wax; wax flakes off at the surface. |
| Look & Feel | Refined matte to deep luster; dimensionally stable, natural grip. | Artificial plastic sheen; flimsy or wire-stiff hand feel. |
Shape & Diameter
Waxed Shoelaces by Shape & Diameter – Exact Specifications for Your Footwear
The fit and wearing comfort of any shoe depend decisively on the shoelace cross-section. At LACCICO, select precisely between filigree 2 mm and substantial 3 mm round laces, as well as flat laces in widths of 3 mm, 4 mm, and 6 mm. Densely braided from 100% pure cotton and thoroughly deep-waxed, our laces ensure friction-free gliding through eyelets, permanent edge stability, and a reliable, non-slip knot hold.
Round laces 2 mm







































Round laces 3 mm
































Flat laces 6 mm














































Flat laces 4 mm






















Flat laces 3 mm






















Last seen
Round or Flat: The Matching Cross-Section Geometry for Eyelets and Shoe Types
Choosing between round and flat profiles is not merely a matter of taste, but an engineering match for the upper leather and eyelet construction: while round laces act as a compact cord running neutrally through the eyelet canal, flat laces distribute tensile force broadly across the entire instep, preventing pressure points on the tongue.
Round Laces (2 mm & 3 mm Diameter)
Compact Cord Guidance for Blind Eyelets, Dress Shoes, and Hooks
Filigree 2 mm round laces (series R2-CS and R2-SL) are tailored precisely to concealed blind eyelets (2.0 to 3.0 mm inner clearance) found on classic business shoes and Goodyear-welted Oxfords. For sturdier low shoes, brogues, or ankle boots with speed hooks and punched metal eyelets from 3.5 mm, the sturdy 3 mm round lace (series R3-CS) delivers the necessary dimensional stiffness to wrap cleanly around hook fittings without flattening.
Flat Laces (3 mm, 4 mm & 6 mm Width)
Flat Contact Area for Even Pressure Distribution and Sneakers
Flat bands rest smoothly against the tongue: the slender 3 mm profile (F3-CS) is the insider choice for fine dress footwear with narrow eyelets. The 4 mm option (F4-CS) bridges the gap for leather sneakers and casual derbys, whereas substantial 6 mm flat laces (F6-CS and F6-XR) provide retro sneakers, court shoes, and rugged heritage boots with prominent edge definition and lasting knot grip.
Material Advantage: 100% Pure Cotton Protects Upper Leather
Unlike abrasive synthetic fibers, densely braided natural cotton prevents a sawing effect within the eyelet canal. The thorough wax bath smooths the fiber structure, minimizes friction on sensitive leather edges, and ensures the shoelace functions as a leather-protecting component even under high tensile pull.

























































































