Modifiers matching belongings:

• old,
• personal,
• minor,
• valuable,
• smaller,
• strange,
• important,
• sentimental,
• small,
• necessary,
• confidential,
• unbreakable,
• defined,

Simple categories matching sentimental:

• object,
• property,
• value,
• item,
• stuff,
• material,
• belongings,
• thing,