Use the stix package in your LaTeX document to create below  integral symbols

\usepackage{stix}
Integral

\smallint
Double Integral

\smalliint
Triple Integral

\smalliiint
Contour Integral

\smalloint
Surface Integral

\smalloiint
Volume Integral

\smalloiiint
Clockwise Integral

\smallintclockwise
Clockwise Contour Integral

\smallvarointclockwise
Anticlockwise Contour Integral

\smallointctrclockwise
Summation with Integral

\smallsumint

\smalliiiint
Finite Part Integral

\smallintbar
Integral with Double Stroke

\smallintBar
Integral Average with Slash

\smallfint
Circulation Function

\smallcirfnint
Anticlockwise Integration

\smallawint
Line Integration with Rectangular Path Around Pole

\smallrppolint
Line Integration with Semicircular Path Around Pole

\smallscpolint
Line Integration Not Including the Pole

\smallnpolint
Integral Around A Point Operator

\smallpointint
Quaternion Integral Operator

\smallsqint
Integral with Leftwards Arrow with Hook

\smallintlarhk
Integral with Times Sign

\smallintx
Integral with Intersection

\smallintcap
Integral with Union

\smallintcup
Integral with Overbar

\smallupint
Integral with Underbar

\smalllowint

Here are the integral symbols that have bigger size

Integral

\int
Double Integral

\iint
Triple Integral

\iiint
Contour Integral

\oint
Surface Integral

\oiint
Volume Integral

\oiiint
Clockwise Integral

\intclockwise
Clockwise Contour Integral

\varointclockwise
Anticlockwise Contour Integral

\ointctrclockwise
Summation with Integral

\sumint

\iiiint
Finite Part Integral

\intbar
Integral with Double Stroke

\intBar
Integral Average with Slash

\fint
Circulation Function

\cirfnint
Anticlockwise Integration

\awint
Line Integration with Rectangular Path Around Pole

\rppolint
Line Integration with Semicircular Path Around Pole

\scpolint
Line Integration Not Including the Pole

\npolint
Integral Around A Point Operator

\pointint
Quaternion Integral Operator

\sqint
Integral with Leftwards Arrow with Hook

\intlarhk
Integral with Times Sign

\intx
Integral with Intersection

\intcap
Integral with Union

\intcup
Integral with Overbar

\upint
Integral with Underbar

\lowint

### Mohammed Anees

Hey there, welcome to aneescraftsmanship I am Mohammed Anees an independent developer/blogger. I like to share and discuss the craft with others plus the things which I have learned because I believe that through discussion and sharing a new world opens up