The right size keeps your adjustable Dia-Style armband in place all day without slipping or feeling tight. Sizes are based on the circumference of your upper arm, where the glucose sensor or patch pump is worn. Each Dia-Style has a clip that fits the size of your sensor or pump: first choose the model made for your device, then your size.
How to measure your arm
- Wrap a flexible tape measure or a piece of string around your upper arm, at the spot where you wear the sensor or pod.
- Measure your arm only: do not measure over the sensor or pod, its thickness does not count.
- Keep the tape snug but not tight, read the measurement in centimetres, then choose the size whose range includes it in the tables below.
Adult sizes
| Size |
Arm circumference (cm) |
Arm circumference (in) |
| S |
23-29 cm |
9.1-11.4 in |
| M |
26-33 cm |
10.2-12.9 in |
| L |
29-38 cm |
11.4-14.9 in |
The strap is adjustable, so the ranges overlap: if your measurement falls into two ranges, both sizes will fit. Take the smaller one if you like a snug fit. Available sizes can vary by model, so check the sizes offered on each product page. See all Dia-Style armbands for adults.
Dia-Style Kiddy size for children
| Size |
Arm circumference (cm) |
Arm circumference (in) |
| XS |
18-25 cm |
7-9.8 in |
Dia-Style Kiddy is made for children's arms and is available for FreeStyle Libre 2, FreeStyle Libre 3, Dexcom G6, Dexcom G7 and Simplera Sync. If the arm measures more than 25 cm, choose an adult size. See all Dia-Style Kiddy armbands.
Compatible devices
Dia-Style exists for these glucose sensors: FreeStyle Libre 2, FreeStyle Libre 3, Dexcom G6, Dexcom G7, Simplera Sync, Guardian 4, Guardian 3, Enlite, Accu-Chek SmartGuide, SIBIONICS GS1, Sinocare iCan i3, GlucoMen Day CGM and Buzud. For patch pumps: Omnipod and GlucoMen Day.
Fit tips
The armband should be snug without being tight: it holds the device securely and stays comfortable, without restricting circulation. If you have a question about sizing, contact our team and we will help you choose.
