Make torrent file based on size with accurate piece size

mkt.sh

#!/bin/bash
#title          :mkt
#description    :This script will create a torrent file with the correct piece size in mind
#author			:Ryahn
#date			:20190523
#version		:0.1.9
#usage			:bash mkt | ./mkt | put in bin folder to use globally
#notes			:Install mktorrent to use
#bash_version	:4.4.12(1)-release
#license        :MIT

#=============================================#
# Change to the tracker URL you would like    #
# use multiple -a to add multiple tracker URL #
# -a http://sukebei.tracker.wf:8888/announce  #
# -a udp://open.stealth.si:80/announce        #
#=============================================#
announce="-a URL"

#=============================================#
#        DO NOT TOUCH BELOW THIS LINE         #
#=============================================#
l15=52428800 #32KiB piece size - 50MiB
l16=157286400 #64KiB piece size - 150MiB
l17=367001600 #128KiB piece size - 350MiB
l18=536870912 #256KiB piece size - 512MiB
l19=1073741824 #512KiB piece size - 1GiB
l20=5368709120 #1MiB piece size - 5GiB
l21=10737418240 #2MiB piece size - 10GiB
l22=16106127360 #4MiB piece size - 15GiB
l23=21474836480 #8MiB piece size - 20GiB
l24=26843545600 #16MiB piece size - 25GiB

for i in "$@"; do
    #Get file/folder size
    SIZE=$(find $i ! -type d -printf '%s\n' | paste -sd+ - | bc)
    
    #Get human readable size
    h=$(du -sh "$i" | awk '{print $1;}')
    
    #Get absolute path
    path=$(readlink -f "$i")
    
    #Check file size and set piece size
    if (( SIZE <= l15 ));
    then
        p=15
        p1="32KiB piece size"
    elif (( SIZE > l15 && SIZE <= l16 ));
    then
        p=16
        p1="64KiB piece size"
    elif (( SIZE > l16 && SIZE <= l17 ));
    then
        p=17
        p1="128KiB piece size"
    elif (( SIZE > l17 && SIZE <= l18 ));
    then
        p=18
        p1="256KiB piece size"
    elif (( SIZE > l18 && SIZE <= l19 ));
    then
        p=19
        p1="512KiB piece size"
    elif (( SIZE > l19 && SIZE <= l20 ));
    then
        p=20
        p1="1MiB piece size"
    elif (( SIZE > l20 && SIZE <= l21 ));
    then
        p=21
        p1="2MiB piece size"
    elif (( SIZE > l21 && SIZE <= l22 ));
    then
        p=22
        p1="4MiB piece size"
    elif (( SIZE > l22 && SIZE <= l23 ));
    then
        p=23
        p1="8MiB piece size"
    elif (( SIZE >= l23 && SIZE == l24 ));
    then
        p=24
        p1="16MiB piece size"
    else
        p=24
        p1="16MiB piece size"
    fi

    echo "
    Making Torrent
    ------------------------
    Name: $i
    Filesize (bytes/human): $SIZE/$h
    Piece Size: $p1
    ------------------------"
    #Make torrent
    mktorrent -l $p $announce -o "${@%/}.torrent" "$path" 
done