Visit the official item page on TSR and click the "Download" button.
Drag and drop the downloaded .package file directly into the folder. Enable Mods in Game : Launch The Sims 4 . Go to Game Options > Other . Ruffle cotton check dress by MysteriousOo at TSR
thesimsresource.com/members/MysteriousOo/downloads/browse/category/sims4-clothing/">MysteriousOo for other age groups like infants or toddlers? How To Download & Install Custom Content | The Sims 4 Visit the official item page on TSR and