MySit High Profile Bell Glides Replacement for Office Chair Without Wheels & Bar Stool, Fixed Stationary Caster Glide, 5-Pack Used to convert swivel office chair with casters to a stationary chair without losing chair height Standard B stem size diameter x height: 7/16"x7/8" (11mm x 22mm) , same stem size as most casters Not fit for Ikea chairs, Ikea chair customer please buy 10mm Stem caster, assin B01M0HNDBB; B01M0TFEZO; B01M05Z78C; 2" Overall glide height - similar to most chair casters. Not suitable for Ikea chair which use 10mm Stem Caster 2" Bottom Width x 1.33" Top Width - 5 years Warranty - Free Replacement or MoneyBack Guarantee