Aston Leather One Pen Slip: Size, Leather & Fit
The Aston Leather One Pen Slip is an open-top sleeve for one fountain pen, hand-made in Brooklyn, New York, from vegetable-tanned cowhide with a leather lining. Aston lists it at 1.5 × 6.5 in (about 38 × 165 mm), in black, brown and tan, with a lifetime warranty. It holds most standard pens, in our $$ band.
On this page
Product facts
- Product
- Aston Leather One Pen Slip (Single Slip Pen Pouch), black, brown or tan
- Brand
- Aston Leather
- Brand origin
- United States
- Made in
- United States*
- Material
- Vegetable-tanned top-grain cowhide, leather-lined
- Price range
- $$$5–20 per case
- Rate it
Notes on these facts
- Made by Aston Leather, Brooklyn, New York. Made in United States: Aston's product page says the One Pen Slip is hand-crafted in Brooklyn, New York, and its site gives its workshop address as 4201 1st Avenue, Brooklyn. Goulet Pens says Aston uses only American-made cowhide. Source. Price: example listing.
- Price bands are typical US retail, checked October 2026.
Key takeaways
- Aston lists it at 1 1/2 × 6 1/2 in; Goulet Pens measures 39.3 × 166.7 × 4.9 mm (1.55 × 6.56 × 0.19 in).
- It's vegetable-tanned cowhide, lined with leather, and hand-crafted in Brooklyn, New York, per Aston.
- It holds 1 pen and has no closure: the pen slides in from the open top.
- It comes in black, brown and tan, and Aston backs it with a lifetime warranty.
- All three Goulet colors were in its best-seller list on October 22, 2026, at Nos. 98 to 100.
What is the Aston Leather One Pen Slip?
It’s a plain leather sleeve that protects one pen in a pocket or bag. There is no zip or flap: the pen slides into the open top and the snug leather holds it.
Aston, a Brooklyn leather maker, calls it the One Pen Slip; Goulet Pens sells it as the Single Slip Pen Pouch. On October 22, 2026, all three of Goulet’s colors sat at Nos. 98 to 100 on its best-seller list.
One Pen Slip specs
| Spec | Value |
|---|---|
| Maker | Aston Leather, Brooklyn, New York |
| Size (Aston) | 1 1/2 × 6 1/2 in (about 38 × 165 mm) |
| Size (Goulet) | 39.3 × 166.7 × 4.9 mm (1.55 × 6.56 × 0.19 in) |
| Capacity | 1 pen |
| Closure | None (open top) |
| Leather | Vegetable-tanned top-grain cowhide |
| Lining | Leather (Aston); raw leather (Goulet) |
| Colors | Black, brown, tan |
| Warranty | Lifetime (Aston) |
| Price band | $$ ($5–20 per case) |
On October 22, 2026, Aston’s own store listed it at US$16.
Which pens fit?
Most standard-size pens, by length. At 166.7 mm long, per Goulet, the slip is longer than a capped LAMY safari (139.5 mm), TWSBI ECO (138.8 mm) or Pilot Custom 823 (149 mm).
Aston doesn’t publish a maximum length or girth, so girth is the thing to check: the sleeve lies 39.3 mm wide when flat, per Goulet.
What’s it made of?
Vegetable-tanned cowhide, lined with leather. Aston says the leather is eco-friendly, scratch-resistant and supple; its product-details page describes top-grain hides finished with natural vegetable oils.
Goulet adds that Aston uses only American-made, water-resistant cowhide. Goulet says the leather becomes supple and more beautiful with age, and Aston says its veg-tan leather ages beautifully over time.
Slip, pen loop or zip case?
A slip protects one pen from scratches; it doesn’t hold it closed. For a pen that rides on a notebook, a Leuchtturm1917 pen loop is lighter.
For three pens in a padded sleeve, see the Rickshaw 3 Pen Coozy; for a collection, a zippered case such as the Galen Leather 10-slot.
How does it compare with Aston’s other pen cases?
It’s Aston’s simplest and cheapest pen holder. Aston’s store also lists a Two Pen Slip in the same style and the same $$ band, a One Pen Leather Case, and zippered cases for two, four, six and twelve pens in our $$$ and $$$$ bands.
The slip suits one everyday pen carried in a shirt pocket, jacket or bag. If you carry two pens, the Two Pen Slip keeps them from knocking against each other; for a whole rotation, a zippered case protects more.
All are made from the same vegetable-tanned leather, per Aston’s product-details page.
How do you care for it?
Keep it dry and let it age. Aston describes its hides as water-resistant, not waterproof, so wipe off spills with a dry cloth.
Cap pens firmly before sliding them in, so ink can’t reach the lining. Aston’s lifetime guarantee covers materials and workmanship; repairs are free, with a charge for return shipping.
Where is it made?
In Brooklyn, New York. Aston’s product page says the One Pen Slip is hand-crafted there, and its site gives the workshop address as 4201 1st Avenue.
Aston says it has worked with vegetable-tanned leather for over 25 years, and that many of its craftspeople have been with the company for over 15. Goulet’s listing says Aston started in New York’s Greenwich Village, making handcrafted custom bags and leather jackets, and that it makes all its products in its own tanneries and factories.
Frequently asked questions
What pens fit the Aston Leather One Pen Slip?
Most standard fountain pens. At 166.7 mm (6.56 in) long, per Goulet, it's longer than a capped LAMY safari (139.5 mm), TWSBI ECO (138.8 mm) or Pilot Custom 823 (149 mm). Aston doesn't publish a maximum pen size.
Is the Aston pen slip real leather?
Yes. Aston says it's made of vegetable-tanned cowhide with a leather-lined interior; Goulet describes it as top-grain veg-tan leather.
Does the Aston pen slip have a closure?
No. Goulet lists the closure as none: the pen slides into the open top and is held by the snug leather.
What colors does the Aston One Pen Slip come in?
Black, brown and tan, at both Aston and Goulet Pens.
Is the Aston Leather pen slip made in the USA?
Yes. Aston says it's hand-crafted in Brooklyn, New York.
Does Aston Leather have a warranty?
Yes, a lifetime guarantee on materials and workmanship. Aston repairs covered items free but charges for return shipping.
Sources
- Aston Leather: One Pen Slip (hand-crafted in Brooklyn, NY; vegetal-tanned cowhide; leather-lined; 1 1/2 × 6 1/2 in; lifetime warranty; black, brown, tan; US$16; read October 22, 2026)
- Aston Leather: About Aston (over 25 years; vegetal-tanned leathers; handcrafted; Brooklyn, NY)
- Aston Leather: Product details (top-grain vegetal-tanned cowhide; lifetime warranty terms; 4201 1st Avenue, Brooklyn)
- The Goulet Pen Company: Aston Leather Single Slip Pen Pouch, Dark Brown (1 pen; 166.7 × 39.3 × 4.9 mm; no closure; raw leather interior; American-made veg-tan cowhide; 56 reviews; read October 22, 2026)
- The Goulet Pen Company: Best sellers (Aston Single Slip in dark brown, tan and black at Nos. 98–100, October 22, 2026)