Bella Loves Patterns Billy Trousers

Bella Loves Patterns


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Buy the Billy Trousers sewing pattern from Bella Loves Patterns. Billy is a loose-fitting, relaxed pair of wide-leg trousers with pressed front and back crease lines. These high-rise trousers feature two sets of pressed pleats, a front fly, and side slash pockets. The waistband sits at the natural waist, fastens with a hook and bar and internal button, and has five belt loops. At the back, Billy has two waist darts on each side and a single welt pocket with a button-and-loop closure. Billy is a floor-length trouser with a plain-finish invisible hem.

This sewing pattern is available to buy in the following formats:

– PDF (available to download immediately after purchase). What is a PDF?

– PDF pattern + Printed A0 copy shop (We print out the A0 pattern sheets, but you’ll need to download the digital instructions, as we don’t print these. The PDF files will be emailed immediately after purchase, and the A0 pattern sheets will be dispatched next working day). What is Copy Shop?

Note if purchasing copy shop printing for Height Group 2: Some of the pattern pieces are split across two A0 sheets and will need to be joined together.

Suggested fabrics: 

Main: Suiting-weight fabrics with very little to no stretch. Wool suitings, wool crepes, wool mohair, wool viscose blends, natural and synthetic suiting, gabardine, flannel.

Lining: Lightweight pocketing fabrics, soft lightweight fabrics, lightweight cotton, silk habotai, cupro, satin viscose, acetate.

Interfacing: Light to mid-weight woven poly interfacing.

The brown trousers are made of a deadstock wool and silk blend fabric. The black trousers are made with fine wool gabardine. Viscose satin lining on both trousers.

Fabric requirements: 

Height Group 1

Main: 140 cm (55″) wide fabric: 2 – 2.5 m (2.2 – 2.7 yd).

Lining: 140 cm (55″) wide fabric: 90 cm (1 yd).

Interfacing: 150 cm (59″) wide: 40 cm (0.5 yd).

Height Group 2

Main: 140 cm (55″) wide fabric: 2.1 – 2.65 m (2.3 – 2.9 yd).

Lining: 140 cm (55″) wide fabric: 90 cm (1 yd).

Interfacing: 150 cm (59″) wide: 40 cm (0.5 yd).

Sizing: UK 6 – 22 (approx. UK 6/8 – 18/20, based on our standardised size chart). Please also check the designer’s size chart and finished garment measurements.

This pattern has two height options:

Height Group 1: 160 cm (5’3″)
Height Group 2: 170 cm (5’7″)

Select the closest height to your body. If you are in the middle, choose the taller. Both groups have the same width around the body – the only difference is in the length. If you are outside these height groups, you may need to alter the pattern length at the lengthen/shorten lines marked on the pattern pieces.

Notions: 1 set sewn-on hook and bar; 1 flat button for inside the waistband, 1.2 cm (1/2″) diameter; 1 flat button for back pocket, 1.5 cm (5/8″) diameter; nylon closed-end zip (see chart for length); stay tape (bias and edge tape); matching thread; basting thread (no special thread required).

PDF pattern includes: Step-by-step instructions; A4 print-at-home pattern (30 pages for Group 1, 36 pages for Group 2); US letter print-at-home pattern (34 pages for Group 1, 40 pages for Group 2); plotter pattern (1 sheet for Group 1, 1 sheet for Group 2); A0 copy shop pattern (2 sheets for Group 1, 2 sheets for Group 2). This pattern has layers, so you can print just the size(s) you need.

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Additional information



Make time

One to two days, All weekend or longer

Sewing level



UK 6 / US 2 / EU 34, UK 8 / US 4 / EU 36, UK 10 / US 6 / EU 38, UK 12 / US 8 / EU 40, UK 14 / US 10 / EU 42, UK 16 / US 12 / EU 44, UK 18 / US 14 / EU 46, UK 20 / US 16 / EU 48

Pattern format

PDF Height Group 1 (160 cm / 5'3"), PDF Height Group 1 (160 cm / 5'3") + Printed copy shop (+£7.00), PDF Height Group 2 (170 cm / 5'7"), PDF Height Group 2 (170 cm / 5'7") + Printed copy shop (+£7.00)

PDF Printing

30 pages (Height Group 1), 36 pages (Height Group 2)

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