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Bella loves patterns



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Billy is a loose-fitting relaxed pair of wide-leg trousers with pressed front and back crease lines. It has two sets of pressed pleats, a front fly, and side slash pockets.

On the back side, Billy has two waist darts on each side and a single welt pocket with a button loop closure on the right side.

Billy is a high-rise pair of trousers with the waistband sitting at the natural waist. The waistband fastens with a hook and bar and an internal button. The waistband has five belt loops.
Billy is a floor-length trouser with a plain-finish invisible hem.

This pattern is for personal and non-profit use only. 

Due to the nature of digital files, we do not accept returns on our PDF patterns or products.


Trousers fabric: suiting-weight fabrics with very little to no stretch percentage. Wool suitings, wool crepes, wool mohair, wool viscose blends, natural and synthetic suiting, gaberdine, flannel.

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

Interfacing: light to mid-weight woven poly interfacing.

The brown trousers are made of dead stock wool & silk blend fabric - blend percentage unknown.

Black trousers are made with fine wool gabardine. 
Viscose satin lining on both trousers.

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).

  • 1 set of sewn-on hook & bar
  • 1 flat button of 1.2 cm (1/2”) - Inside the waistband
  • 1 flat button of 1.5 cm (5/8”) - back pocket
  • 1 nylon close end zip (see chart for sizes)
  • Stay tape - bias and edge tape
  • Matching thread
  • Basting thread - no special thread required
  • Tailor’s ham
  • Chalk
  • Ruler
  • Thin hand sewing needle
  • Wood clapper
  • Sleeve board
  • Pressing cloth
  • Buttonhole opener


  • Intermediate 3/5


  • Complete photographed sewing instructions available in PDF
  • A0 Copyshop PDF file 
  • Plotter A0 width PDF file with continuous printing
  • A4 paper format for Home Printing PDF file
  • Letter paper format for Home Printing PDF file
  • This is a multi-size sewing pattern set in layers
  • Includes seam allowances 


6 to 22 UK,  34 to 50 EU,  2 to 18 US 

All of our patterns are drafted to fit B cup size.

Available from bust 80 cm to 112 cm  - 31 1/2" to 44"

Available from hip 87 cm to 119 cm  - 34 1/4" to 46 3/4"

Bella loves patterns size chart update



The pattern is offered in two height groups: 160 and 170 cm (5’3” and 5’7”), when buying this pattern you should select the closest height to your body, if you are in the middle choose the tallest. Both patterns have exactly the same width around the body, the only difference is in the length.

If you are outside these groups, you may need to alter the pattern length at the lengthen/shorten lines marked on the pattern pieces

For more info check our Size Cart page.


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Customer Reviews

Based on 3 reviews
Amazing pattern!

I don't think I've ever written a review for a pattern before, but I find it necessary for this pattern. The level of detail, both in the construction of the pattern as well as the writing of the instructions, is amazing. While the extra steps can be time consuming, they are well worth it to make the garment have a beautiful and clean finished look. I love that such details were included, as I haven't really seen that from other patterns

Great trousers

For the first time in my more than 30 years of sewing experience, a pair of pants fits without having to make any adjustments. The instruction are very clear with the step by step photo explanation. the finish of the pants is beautiful

LOVE the photo instructions and details!

While I have not yet started these trousers, I am so happy to see actual photographs illustrating the instructions! All the other PDF patterns I have use drawings; just not the same. I appreciate the fine sewing details in the instructions also. This will be a garment that lasts for many, many years. These sewing details have gone by the wayside with "fast fashion" and it's wonderful to see proper garment construction details included in your instructions! One of the reasons I sew is to make quality garments that last. I hope to see more patterns added to your collection.

Love making beautiful clothes

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