Teagan T-shirt sewn by lasermonkey12 · lasermonkey12 / FreeSewingSource ↗

Watch: Teagan Sewing Machine Edition: introduction

Watch: Teagan Sewing Machine Edition: supplies

CAIBI ASSESSMENT

Teagan T-shirt

CAIBI VERDICTWORTH CONSIDERING

A made-to-measure FreeSewing T-shirt generated from body measurements, then cut and sewn from stretch jersey on an ordinary sewing machine or overlocker.

See what the build involves Original source ↗

Build or buy?

Compare the documented build with the purchase reference.

Build it yourself

Known parts cost£9–£14Build total not establishedFabric only; thread and other supplies extra

Time: Not published by source
Difficulty: 2/5
Physical processes: Sewing machine or overlocker · Fabric scissors or rotary cutter · Iron · Measuring tape · Pins or clips

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Purchase reference

Buy price referencePrice not checkedNo priced alternative recorded

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Purchase comparison not yet priced

What the prices cover

Current UK jersey examples recorded by CAIBI for the source-recommended material quantity.

Includes: About 1 m of suitable cotton/elastane jersey.

Not included: Sewing machine/overlocker; Thread/basic supplies if not owned; Delivery.

Build evidence recorded 4 Sep 2026. Currency conversions are approximate.

The fabric cost is visible, but labour, sewing equipment, fit and fabric choice dominate the decision. A basic retail T-shirt would create a false like-for-like saving figure.

BUILD AT A GLANCE

Source view and main parts

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Teagan T-shirt sewn by lasermonkey12 · lasermonkey12 / FreeSewing ↗

PHYSICAL BUILD5 key parts or groups

No.	Source specification
01	About 1 m / 1.1 yd of suitable stretch knit fabric
02	Cotton jersey with some elastane is a source-recommended beginner-friendly route
03	Matching thread
04	Printed
05	Optional clear elastic for shoulder reinforcement

Full source specifications

About 1 m / 1.1 yd of suitable stretch knit fabric
Cotton jersey with some elastane is a source-recommended beginner-friendly route
Matching thread
Printed, projected or paperless Teagan pattern generated from the wearer measurements
Optional clear elastic for shoulder reinforcement

TOOLS / PROCESSES5 involved

Sewing machine or overlocker
Fabric scissors or rotary cutter
Iron
Measuring tape
Pins or clips

The real-world work

YOU STILL HAVE TOThe real-world work

Measure the wearer
Choose suitable jersey
Generate and transfer the pattern
Cut stretch fabric accurately
Control fabric feed at the machine
Sew neckline, sleeves, side seams and hems
Try on and verify fit

THE BUILD SEQUENCE

How it comes together

1Preparation

Measure the wearer and generate the pattern
Enter the required body measurements and choose the Teagan options before exporting. AI can explain landmarks and option effects, but the actual measurements must come from the wearer.
AI + YOU
Choose an appropriate knit
Use a knit with useful stretch and recovery. FreeSewing specifically suggests cotton knits as an easier route for people new to knits and recommends roughly 130 to 200 gsm for typical T-shirt fabric.
YOU
Cut the small pattern set accurately
Cut front and back on the fold, mirrored sleeves and the neck strip. Check fabric direction, stretch direction and pattern scale before cutting.
YOU

2Build and assembly

Join shoulders and set the sleeves
Sew the shoulder seams, then fit each sleeve into the open armhole. A narrow zig-zag on a normal sewing machine is an accepted source route if no overlocker is available.
YOU
Make the neck finish carefully
Choose the documented knit-band or binding method. The source identifies this as the most complex part because the band must be stretched enough to lie flat without creating puckers or a floppy neckline.
AI + YOU
Close the sides and sleeves
Fold the garment at the shoulders, align the side and sleeve seams and sew each continuous side/sleeve seam while avoiding unintended stretching.
YOU

3Configure and test

Finish hems with a stretch-capable stitch
Finish body and sleeve hems using an overlocker/coverlock where available, or the source-supported twin-needle or zig-zag route on a normal sewing machine.
YOU
Wear-test and alter from evidence
Check neckline, sleeve position, chest fit and garment length on the real wearer. Use those observations to adjust the next generated pattern instead of guessing from the flat pattern alone.
AI + YOU

Benchmark this project

Use the Teagan T-shirt prompt. Compare what different models deliver, then add what happened when you tried it.

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View the project prompt

CAIBI adaptation · Prompt 1.0 · Project source

Prompt for Teagan T-shirt

CAIBI project benchmark: Teagan T-shirt
Prompt version 1.0

Help me build Teagan T-shirt using the existing creator project at https://freesewing.eu/docs/designs/teagan/. This is a CAIBI benchmark adaptation of the project build brief, not a claim about how the creator used AI.

Project context:
- A made-to-measure FreeSewing T-shirt generated from body measurements, then cut and sewn from stretch jersey on an ordinary sewing machine or overlocker.
- Build context: About 1 m / 1.1 yd of suitable stretch knit fabric; Cotton jersey with some elastane is a source-recommended beginner-friendly route; Matching thread; Printed, projected or paperless Teagan pattern generated from the wearer measurements; Optional clear elastic for shoulder reinforcement.
- Where AI helps: Explain measurements and pattern options, Help choose between knit band and binding finishes, Explain stretch percentage and suitable stitch settings, Troubleshoot puckering, wavy seams and neckband fit from observed symptoms, Help plan alterations before recutting fabric.
- Physical work: Measure the wearer, Choose suitable jersey, Generate and transfer the pattern, Cut stretch fabric accurately, Control fabric feed at the machine, Sew neckline, sleeves, side seams and hems, Try on and verify fit.
- Main limitation: Stretch fabric is less forgiving than the small number of pattern pieces suggests. Neckband tension, fabric feed, stitch choice and pressing can visibly change the result, and AI cannot feel whether the knit is being stretched or fed evenly at the machine.

Read the source first. Use its published design, files, dimensions and parts as the baseline; do not redesign it unless a missing detail requires a clearly labelled proposal. If you cannot access a source or verify a revision, say so.

Provide one practical build package:
1. Design and files: explain the source design, link the original editable files, and identify missing files or modifications.
2. Parts and fabrication: give quantities, exact variants and compatibility, plus a cutting or printing list where applicable. Preserve source dimensions; flag anything unconfirmed.
3. UK and US purchasing: direct product links, checked dates, stock, pack sizes, taxes, delivery and regional costs. Mark unverifiable details as unknown; do not invent links, prices or availability.
4. Assembly: an ordered guide covering fabrication, fitting, wiring or software as applicable, setup, checks and troubleshooting.
5. Cost and time: separate parts, fabrication, delivery, hands-on time and machine time, with assumptions and exclusions.
6. Function and ease: a test plan for the project's stated purpose, likely difficulties, required skills and any corrections or limitations.

Keep source facts, your proposals and items needing physical verification distinct. An estimate is not a measured build result. Do not claim to have built or tested hardware. Include failed attempts and omissions. If a section does not apply, say why.

Use the source as accessed during this run and record its revision or access date. The prompt is fixed; the linked source can change.

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Benchmark results 0

No reviewed results yet for Teagan T-shirt. Add the first result →

AI IN THIS PROJECT

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CAIBI · AI CAN HELP

AI can help with

Explain measurements and pattern options
Help choose between knit band and binding finishes
Explain stretch percentage and suitable stitch settings
Troubleshoot puckering, wavy seams and neckband fit from observed symptoms
Help plan alterations before recutting fabric

CAIBI · AI CAN'T DO

You still need to

Measure the wearer
Choose suitable jersey
Generate and transfer the pattern
Cut stretch fabric accurately
Control fabric feed at the machine
Sew neckline, sleeves, side seams and hems
Try on and verify fit

Original source AI use and prompts

SOURCEThe original project does not publish an AI prompt

The prompts below are CAIBI helpers for this build. They are not presented as instructions from the creator.

CAIBI STARTING PROMPTS

Copy a prompt for this build

Each prompt tells AI to keep the original project source as the reference and to flag anything you must verify on the real build.

Ways to take it further

AFTER THE FIRST BUILD

Ways to take it further

Different neckline width and finishLonger or shorter bodySleeve-length changesHigh-bust fit routeRaglan-style community adaptationsReclaimed T-shirt fabricContrast neck band

More routes and resources

OTHER WAYS TO GET THERE

You do not have to follow one route.

ORIGINAL BUILDFollow the creator route

Use the published files and instructions as the baseline.

ALTERNATIVE PROJECTAlbert Apron

A made-to-measure FreeSewing apron generated from five body measurements, then cut and sewn from ordinary sturdy fabric.

REVIEWED RESOURCES

Useful places beyond the main source

DOCSTeagan design documentation

Primary FreeSewing documentation covering measurements, approximately one metre of suitable fabric, knit-fabric guidance, cutting and machine requirements.

DOCSTeagan sewing instructions

Primary construction sequence covering shoulders, sleeves, neck finish, side seams and hems, including a standard-machine zig-zag route.

COMMUNITY2026 Teagan beginner class report

Course teacher reports using Teagan with first-time sewers in March 2026, including a student completing a professional-looking shirt on his first sewing project.

COMMUNITYIndependent first-garment Teagan reference

Independent sewing-community post from a first garment build using Teagan as a fit and pattern-shape reference, with candid discussion of knit-fabric handling difficulty.

DOCSCurrent UK cotton jersey example

Current UK price evidence for 200 gsm 95% cotton / 5% elastane jersey at £8.50 per metre when checked on 2 Sep 2026.

SOURCE · CAIBI · BUILDERS

What supports the verdict

SOURCEFreeSewing

Current FreeSewing documentation provides the measurement set, one-metre material guidance, stretch-fabric recommendations, cutting instructions and complete sewing route. A March 2026 teaching report describes successful first-time sewists using Teagan. The source image and its provenance are identified in the image caption.

Open source ↗

CAIBIWORTH CONSIDERING

Teagan is a useful low-cost example of digital assistance leading to a genuinely personal physical result. The pattern generator turns measurements and design choices into a custom garment pattern, while AI can explain stretch, neckline options, sewing terminology and troubleshooting. Buying a basic T-shirt is usually cheaper than valuing your time, so the reason to build is fit, fabric choice, learning and control rather than simple cash saving.

Evidence: Strong

BUILDERSNo published reports yet

Actual time, cost, changes and outcomes appear here after submitted builds are reviewed.

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HAVE YOU MADE THIS?

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First-hand evidence improves the assessment

What we want to know

What happened when you actually tried to make it.

Did it work?
Actual time and cost
What did you change?
What was harder than the source suggested?
Would you build it again?