how thick is the spine of kjil swords

The spine of a kilij is usually not a single fixed thickness ; it varies by maker and blade length, but a published example shows a kilij blade thickness ranging from 7.1 mm at the base down to 3.8 mm toward the tip. That gives a practical ballpark for a functional modern kilij, especially one with a T-section spine design.

What that means

A kilij’s “spine” is the thick reinforced back of the blade, so measurements are often given as thickness along the blade rather than one spine-only number. The T-section geometry is specifically used to increase rigidity while keeping weight down.

Rough range

For a typical functional kilij, expect the spine area to be around:

• About 6–7 mm near the base
• About 4 mm or a bit under near the tip

Practical note

If you mean an antique kilij, thickness can vary a lot depending on period, region, and wear. If you mean a modern reproduction, the maker’s spec sheet is the best source because some models are intentionally heavier or slimmer than others.

TL;DR: a kilij spine is commonly in the 4–7 mm range, with the thickest part near the guard and tapering toward the point.