Quick answer: A frogmouth pocket is a curved front pocket opening on trousers, wider at the mouth than a narrow slant, and shops use it when they want a casual or workwear-leaning front without a jeans-style cross pocket. Write the mouth shape, pocket-bag cloth, and whether a coin pocket is included before the sample is cut. Shi Yuan (Suit Factory) takes MTM from 1 and bulk from 50 per style for overseas tailor shops, MTM boutiques and private-label brands, not retail — send a reference photo and the trouser style name on WhatsApp.
A private-label line wants trousers that sit between jeans and dress trousers. The designer says "frogmouth pockets" and sends a flat sketch with no mouth width, no bag cloth and no note on the coin pocket. The sample comes back with a sharp dress slant, or with a mouth so wide the hip looks soft. Frogmouth is a shape name; it still needs measurements and finishes on the brief.
What is a frogmouth pocket on trousers?
It is a front pocket whose opening curves like a wide shallow arc — the name comes from the mouth shape — set toward the side seam rather than as a jeans-style cross pocket. It is common on casual and some tailored-casual trousers. It is not the same decision as slant versus on-seam on a dress trouser; that angle choice is in slant or on-seam side pockets. Jacket pocket styles are separate in flap, jetted and patch pockets.
Brief lines
Mouth shape: frogmouth curve; width at opening as a word (narrow / standard / wide) or a reference photo — width changes the hip line.
Placement: distance from waistband and side seam as on the sketch — drift makes pairs look different.
Pocket bag: cloth for the bag and any reinforcement — cheap bag cloth wears through first.
Coin pocket: yes or no, and which side — easy to assume and get wrong.
Finish: clean finish inside; bar-tacks at mouth ends — mouth ends are stress points.
Casual vs dress: frogmouth on casual; dress slant or on-seam if the line is formal — stops a dress trouser getting a casual mouth.
When should a shop choose frogmouth instead of a dress pocket?
Choose frogmouth when the trouser is sold as casual or tailored-casual, when the cloth is cotton, linen-blend or a soft wool that will be worn without a suit jacket, or when the brand's reference garment uses that mouth. Keep a dress slant or on-seam when the trouser is part of a suit or a formal separate. Mixing a frogmouth mouth onto a sharp dress trouser confuses the line. Pocket-bag cloth for dress programmes is in trouser pocketing fabric. A small watch pocket on dress trousers is a different brief in the fob pocket brief.
Spec lines
Mouth: "frogmouth front pockets, width per reference photo".
Bag: "pocket bag in [cloth]; reinforced at mouth ends".
Coin: "coin pocket left" or "no coin pocket".
Stitch: "bar-tack at both mouth ends".
Pairing: "same mouth shape on all sizes of the style".
A worked note
"Brand ref A-12. Casual trouser, cotton twill. Frogmouth front pockets, standard width per sketch. No coin pocket. Pocket bag in matching pocketing; bar-tacks at mouth ends. Not for the dress-trouser block."
At the sample
Compare mouth shape to the reference photo on a flat table.
Check both sides for matching curve and width.
Load the pockets with a phone and keys; look for sag or ripples.
Turn the trouser inside out and check bag stitch and bar-tacks.
Write pass or change in words; do not rely on a vague "pockets fine".
Which track fits frogmouth trousers?
MTM — from 1 piece: one client's casual trousers with frogmouth pockets cut to his measurements.
Bulk — from 50 per style: a brand's casual trouser style with the mouth, bag and coin-pocket rule sealed before bulk from 50.
The sample takes 7–14 days; production takes 14–21 days after measurements, cloth and construction are locked. Production days are not delivery days. Single-client and private-label routes for shops are on our made to measure suit factory page, and sample approval steps on our sample policy page.
Send a reference photo and the trouser style name on WhatsApp +65 8013 8838 and we reply with what is still open.
FAQ
What are Shi Yuan's order tracks and clocks? Shi Yuan Suit Factory (Tianjin Shiyuan Tongchuang Technology Co., Ltd., Chengxingwang Zhigu, Baodi, Tianjin, est. 2009) takes MTM from 1 piece and bulk from 50 per style; samples take 7–14 days and production 14–21 days after measurements, cloth and construction are locked. WhatsApp +65 8013 8838.
Are frogmouth pockets the same as jeans pockets? No. Jeans usually use a cross pocket; frogmouth is a curved side-front opening on tailored or casual trousers.
Can dress suit trousers take frogmouth pockets? They can if you want a soft casual suit look, but most formal lines keep a slant or on-seam dress pocket.
Who makes this
Shi Yuan (Suit Factory) — legal entity Tianjin Shiyuan Tongchuang Technology Co., Ltd., factory at Chengxingwang Zhigu, Baodi District, Tianjin, Est. 2009. Our founder brings four decades in Chinese menswear manufacturing; founded Shi Yuan in 2009. acumenwear.com is the export domain for Shi Yuan Suit Factory. Order threads: WhatsApp +65 8013 8838 · houzhenying226@gmail.com. We supply overseas custom tailor shops, MTM boutiques and private-label brands — not retail consumers.
Shi Yuan Suit Factory is not affiliated with Tianjin Shiyuan Clothing Co., Ltd.
Next step: sample or inquiry
Send a reference photo, cloth type and whether a coin pocket is required. Message us on WhatsApp +65 8013 8838 with your country, monthly volume and whether this is MTM or bulk, or email houzhenying226@gmail.com. We reply with the sample route and what we still need from you.
Last checked: 2026-11-06. Figures on this page were checked against Shi Yuan's own published terms (sample policy and process pages). Anything not listed here is confirmed in writing on the order thread.
