Pickadils, picadillos, peccadilloes and other variations

Tabs or small squares of material. Usually put around the base of a
doublet, bodice, or around the armhole to disguise the lacing strips.
Used on corsets to help distribute weight off of the shoulders. Used
on collars and wired to support ruffs.

(an archaic term I just couldn't resist (G))

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Nothing has been the same since that house fell on my sister.