If you have limited storage space and need to decide which coil size to keep in stock at all times, the market has a clear answer: diameters ۶.۵ and ۸ میلیمتر. These two form the backbone of demand for coils and wire.
Why ۶.۵ and ۸
These two diameters are exactly within the range required for the most common applications, from producing mesh and chain-link fencing to rebar tying wire and general-purpose uses. Size ۵.۵ is also in high demand for drawing into thinner wires, but ۶.۵ and ۸ have the highest turnover in the general market.

Diameters ۶.۵ and ۸ have the highest turnover in the coil and wire market and should always be kept in stock.
Storage Guide
| Diameter | Demand level | Application and recommendation |
|---|
| ۵.۵ | High | Drawing into thin wire; maintain a good inventory |
| ۶.۵ | Very high | Mesh, rebar tying wire; maintain the highest inventory |
| ۸ | Very high | Fencing, general-purpose uses; maintain the highest inventory |
| ۱۰ | Medium | Construction coil; maintain limited inventory |
| ۱۲ and above | Low | Based on specific orders |
Balance Between Diameter and Type
In addition to diameter, you should also consider the balance between black wire and galvanized wire. If customers in your region mostly produce fences and outdoor mesh, the share of galvanized wire in your inventory should be higher. Stockpiling large volumes of a low-demand size or type ties up capital.
The best guide is to record your actual sales over several months to see which diameter and type are purchased repeatedly in greater quantities in your region.
Also Consider the Standard Coil Weight
Market coils are usually supplied in standard weights, for example around پانصد تا هزار کیلوگرم depending on the diameter and factory. If your warehouse or handling equipment is not ready for heavier weights, check this point before purchasing large volumes; manually handling heavy coils without a suitable crane or forklift is both time-consuming and poses a risk of worker injury. For customers who want smaller coils, also consider the possibility of cutting and repackaging them.
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