I use quality. 2mm mylar/plastic type stencil sheets. They are thin and flexible but not as thin as paper. They are NOT the cheap flimsy paper thin transparency sheets I've seen used before. These are the best quality material sheets I've been able to find so this is all I use.
Cursive Alphabet Stencils Single Letters or Entire Alphabet
Calligraphy Small Letter Stencil 1/2 Inch
Shop – Page 6 – Kerri Bradford Studio
Letter Templates
Free Printable Stencil Letters - Stencil Letters Org
Skatan 8 Pack Drawing Painting Stencils Template Sets Number and Alphabet Letter Drawing Painting Stencils Template for Scrapbooking
Calligraphy Monogram Initial 9 Tall Alphabet Letter W Stencil on 11 x 8.5 Sheet
Fine Judaica: Printed Books, Manuscripts Autograph Letters, Graphic & Ceremonial Art
Calligraphy Monogram Initial 9 Tall Alphabet Letter E Stencil on 11 x 8.5 Sheet
CALLIGRAPHY MONOGRAM INITIAL 9 Tall Alphabet Letter Q Stencil on
x4 158/189 Wait and See Turbo Astral Radiance Pokemon Trainer 4