Stoma Pouch Guide UK: Types, Sizes & How to Choose the Right One

Choosing the right stoma pouch is one of the most important decisions you will make for your comfort and confidence. Whether you are newly diagnosed or looking to improve your current setup, this guide covers everything UK ostomates need to know — from pouch types and sizing to NHS entitlements, top brands and accessories for an active life.

What is a Stoma Pouch?

A stoma pouch (also called a stoma bag or ostomy bag) is a collection device that attaches to the skin around your stoma to collect waste output. It consists of a skin barrier (wafer or base plate) that adheres to the peristomal skin, and the pouch itself. Available on NHS prescription, pouches come in many formats to suit different stoma types, body shapes and lifestyles.

There are three main types of stoma that require a pouch:

• Colostomy: the stoma is in the colon. Output is typically semi-formed to solid.
• Ileostomy: the stoma is in the small intestine (ileum). Output is liquid and frequent.
• Urostomy: the stoma diverts urine. Requires pouches with a drainage tap at the base.

One-Piece vs Two-Piece Systems

One-Piece Systems

The skin barrier and pouch are combined into a single unit applied and removed together. One-piece systems sit lower-profile under clothing and are popular with active users and swimmers.

Advantages: slimmer, more discreet, fewer components to manage.

Considerations: the entire unit is replaced each time, meaning more frequent adhesive changes on the skin.

Two-Piece Systems

The base plate and pouch are separate components that lock or click together. The base plate can stay on the skin for several days while pouches are swapped independently.

Advantages: fewer base plate changes, more economical, easy stoma inspection.

Considerations: slightly more bulk, though modern two-piece systems are remarkably slim.

Closed vs Drainable Pouches

Closed Pouches

Sealed at the bottom and disposed of when full. The preferred choice for colostomies with formed output — typically changed 1–3 times per day. Most include an activated carbon filter for discreet gas management.

Drainable Pouches

An opening at the base — closed with a clip or Velcro — allows the pouch to be emptied multiple times without removal. Standard for ileostomies and urostomies. Changed every 1–3 days.

How to Choose the Right Pouch Size

Getting the aperture size right is essential for protecting peristomal skin:

• Measure your stoma regularly — especially in the first 6–8 weeks after surgery as swelling reduces.
• The aperture should be 1–3mm larger than the widest point of your stoma.
• Too large exposes skin to output. Too small may constrict stoma tissue.

Major brands — Coloplast, Hollister and Convatec — provide measuring guides and offer pre-cut or cut-to-fit barriers. All are available on NHS prescription.

Top Brands: Coloplast, Hollister and Convatec

Coloplast SenSura Mio features flexible barriers that mould to body contours. Their Brava accessory range is widely regarded as the gold standard for skin protection.

Hollister CeraPlus uses ceramic technology for skin health and long-wear adhesives. Excellent charcoal filter performance.

Convatec Natura and Esteem+ offer Durahesive barriers ideal for irregular skin — particularly useful after abdominal surgery. Their Click system provides a secure, audible connection.

Pouch choice is personal. Ask your stoma nurse for samples — most manufacturers offer free trial programmes through NHS stoma services.

NHS Entitlements for Stoma Supplies

In the UK, stoma pouches and accessories are available on NHS prescription. As an ostomate, you are entitled to:

• VAT exemption: stoma products are zero-rated for VAT if you have a relevant medical condition — you can claim this relief directly with suppliers.
• Prescription Prepayment Certificate (PPC): if you pay for prescriptions, a PPC can significantly reduce your costs.
• NHS Appliance Contractor services: companies like Coloplast Care and Hollister Home Delivery deliver supplies directly to your home on prescription.

Essential Accessories

• Sealing rings and paste: fill contour irregularities and prevent leaks.
• Barrier sprays and wipes: protect peristomal skin.
• Adhesive remover: gentle barrier removal without skin damage.
• Stoma belt: extra support during physical activity or long days.
• Stoma underwear: holds and conceals the pouch comfortably and discreetly.

At SIIL, we design products made exclusively for people with stomas. Our stoma belt provides secure, all-day support and is compatible with all major pouch systems — from desk work to the gym.

Daily Life Tips

Building Your Routine

Change your system first thing in the morning when stoma output is typically slowest. Empty the pouch at one-third to half full to prevent excess weight loosening the seal.

Sport and Exercise

Exercise with a stoma is entirely possible and encouraged. A stoma belt provides extra security during high-impact activities, swimming or heavy lifting — trusted by UK ostomates from parkrun enthusiasts to Ironman competitors.

Our SIIL stoma belt is made from breathable fabrics and fits over all pouch systems. Compatible with Coloplast, Hollister and Convatec one and two-piece systems.

Travel

• Pack twice the supplies you expect to need.
• Split supplies between hand luggage and checked bags.
• Stoma supplies are generally exempt from airport liquid restrictions — carry a medical letter for smoother security checks.
• Colostomy UK and IA (Ileostomy and Internal Pouch Association) provide travel cards in multiple languages.

When to Contact Your Stoma Nurse

• Persistent redness, soreness or rash on peristomal skin
• Frequent leaks despite correct technique
• Changes in stoma size, colour or appearance
• Pain, bleeding or bulging around the stoma

NHS stoma nurses (stomal therapy nurses) provide specialist support — contact your GP or hospital stoma service to be referred.