Abstract: An adjustable yarn package holder which can support one of a plurality of variously sized yarn packages on a creel. The yarn package holder includes a pair of longitudinally adjustable elongate support arms which define a mandrel for receiving the core of a yarn package. The elongate support arms may be selectively moved between a first closely spaced apart position and a second widely spaced apart position to define different cross-sectional sizes of mandrels for receiving yarn packages having cores of different diameters. The support arms are fixed to respective guide arms which slideably engage opposing guide edges of a base plate. The guide arms preferably include opposing gear racks, and a rotatable pinion gear is positioned between and in engagement with the opposing gear racks. For moving the pinion gear, a pair of lever arms are fixed to and extend radially from the pinion gear, and the lever arms include provision whereby they may be releasably locked in a selected rotational position.