Woven in coir, items of equal size (9)

I believe the answer is:

isometric

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'of equal size' is the definition.
(I've seen this before)

'woven in coir items' is the wordplay.
'coir items' can be anagrammed to 'ISOMETRIC'.
But, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for isometric that I've seen before include "Like some exercises" , "of similar dimensions" , "equal in measurement" , "Type of exercise performed against resistant object" , "regarding muscular action" .)

I've seen this clue in The Sunday Times.

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